Daily Archives: June 1, 2017

How an Icon of Evolution Lost Its Flight – The Atlantic

Posted: June 1, 2017 at 10:41 pm

In 1835, the Galapagos Islands shaped the thoughts of a young British naturalist named Charles Darwin, and helped inspire his world-shaking theory of evolution. For that reason, the islands have become something of a Mecca for biologists, who travel there to see the same odd creatures that enthused Darwin.

I like seeing wildlife in general, but some of these creatures have become iconic in evolutionary biology, says Leonid Kruglyak from the University of California, Los Angeles, who visited the Galapagos in 2012. The famous finches, with their well-adapted and variously shaped beaks, are especially famous, but Kruglyak found them underwhelming. He was more drawn to the flightless cormorants.

There are around 40 species of these birds in the world, and all but one of them can fly. The sole exception lives on the Galapagos, and can be seen on the coasts of the Isabela and Fernandina islands, drying its shriveled and tatty wings in the sun. Compared to other cormorants, this one is about 60 percent bigger. Its wings are smaller and its feathers shorter. Its breast muscles, which would normally power a flapping stroke, are smaller, and the part of the breastbone that anchors those muscles is stubbier.

Kruglyak wanted to know why this bird couldnt take to the skies. Specifically, as a geneticist, he wanted to know what genetic changes had grounded it. When he got back to his lab, he reached out to a research team that had collected blood samples from 223 flightless cormorantsalmost a quarter of the total endangered population. He and his own team used these samples to sequence the cormorants genome, then compared its DNA to that of three other cormorant species, looking for mutations that are unique to the flightless one, and that are likely to alter its genes in important ways.

They found a long list of affected genes. Many of these, when mutated in humans, distort the growth of limbs, resulting in extra fingers, missing digits, and other similar conditions. Some of them are also responsible for a group of rare inherited disorders called ciliopathies, where ciliasmall hair-like structures on the surface of cellsdont develop correctly. Cells use cilia to exchange signals and coordinate their growth. If these hairs dont form correctly, many body parts dont develop in the usual way. In particular, some people with ciliopathies grow up with short limbs and small ribcagesa striking parallel with the stunted wings and small breastbone of the flightless cormorant.

All of this is circumstantial. It suggests, but doesnt confirm, that the cormorants flightless wings might result of a kind of benign ciliopathy. To make a stronger case, Alejandro Burga, a member of Kruglyaks team, focused his attention on a couple of genes. One of themIFT122controls the development of cilia across the animal kingdom. The Galapagos cormorant has a single mutation in a part of the gene that is always the same in other species.

The ideal experiment would be to alter the same gene in another species of cormorant, to see if they develop shorter wings. But cormorants arent exactly easy to work with in a lab, so Burga turned to a more amenable animal: the tiny roundworm, C. elegans. He used the gene-editing technique called CRISPR to change the worms version of IFT122 to match the cormorants. And sure enough, its cilia stopped working correctly.

Burga also focused on another gene called CUX1, which controls the activity of many other cilia-building genes. Its especially active in the cartilage-making cells that lay the foundations for our skeletons. And here too, the cormorant has an unusual changeits missing a 12-letter stretch of DNA thats present in almost all other back-boned animals. And when Burga deleted this same stretch from the mouse version of CUX1, the cartilage-making cells divide more slowly.

All of these experiments paint a consistent picture. By building up mutations in several genes, the ancestors of the Galapagos cormorant changed the workings of its cilia and so altered the growth of the cells that form its skeleton. The result: shorter wings, smaller breastbones, and the loss of flight.

Still, there are plenty of missing details. As Kimberly Cooper, from the University of California, San Diego, notes in a piece that was published Kruglyaks results, cilia play important roles all over the body, and humans with ciliopathies have problems with their kidneys, vision, and nervous system. How has the Galapagos cormorant escaped this fate? Do its mutations specifically affect the cilia in its limbs? Or has it evolved safeguards in other organs? Or maybe theyre just weaker mutations, that tweak the function of the genes but dont disrupt them to the same extent as in human ciliopathies, says Kruglyak.

Id love to see similar studies in other lineages of flightless birds, because I imagine there are many different pathways to the loss of flight, says Natalie Wright from the University of Montana, who studies the evolution of flightlessness. She notes that cormorants dive for their food, and shorter wings make them less buoyant and more streamlined underwater. Most species can only shrink their wings so far without disrupting their ability to fly. But when cormorants landed on the Galapagos, they found a paradise with year-round food and zero predators. They didnt need to flee or migrate, so they could fully adapt to a diving life by shrinking their wings.

But other island birds that have become flightless, like rails, pigeons, parrots, owls, and songbirds, arent divers, and wouldnt benefit from shorter wings. Wright suspects that they lost their flight for reasons of efficiency: It takes less energy to grow small flight muscles. Perhaps different genes are involved, she suggests.

A decade ago, it would have seemed implausible to ever test if Wright is right. But Kruglyaks work show just how powerful genetics has become, and how quickly todays scientists can uncover the evolutionary secrets of intriguing animals. In five years, I went from seeing this unusual creature in the wild to doing its genome to getting a lot of good clues about what happened [to its wings], he says.

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Lesbians survived evolution because men found them attractive, claims study – RT

Posted: at 10:41 pm

Men are attracted to bisexual and gay women and still want to produce offspring with them, claims a new study, which has put forward an explanation for how lesbianism survived and flourished through evolution. The theory has attracted fierce rebuttals.

A team led by Cypriot Menelaos Apostolou from the University of Nicosia interviewed 1,509 heterosexuals both men and women to find out how they would feel about their partner sleeping with the same sex.

It was found that heterosexual women did not desire partners who experienced same-sex attractions, but a considerable proportion of heterosexual men desired partners who experienced same-sex attractions. In addition, it was found that men were more sexually excited than women by the same-sex infidelity of their partners, and they desired more than women, their opposite-sex partners to have sex with same-sex individuals, concluded the study published in Science Direct, as quoted by Pink News.

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More precisely, 34.3 percent of males and only 7.8 percent of women would prefer a partner who is attracted predominantly to members of the opposite-sex but occasionally of the same-sex.

One explanation is that in evolutionary terms, women were not reproductive rivals to straight men.

A woman, driven by her sexual desires, may seek sexual contact outside of her long-term intimate relationship. When this woman has sex with another woman she does not have sex with another man which translates into same-sex contact reducing the risk of cuckoldry,said the study.

Another explanation, put forward by previous studies on the subject, is that a man would welcome the addition of a new woman into his partners social circle as a chance to spread his seed further without repercussion a polyamorous relationship in which everyone benefits.

It is, however, notable that only about 15 percent of those surveyed desired to see bisexual tendencies in their long-term partner.

Conversely, in a mirror scenario women would not presumably benefit from the father of their child being distracted by another suitor, even if male, nor would they desire confusion about the identity of the progenitor of their offspring.

The study has been greeted with hostility from published media, and Twitter, where many accused Apostolou of trying to downplay the existence of lesbianism, or failing to provide robust evidence.

"The paper totally ignores a lot of other possible hypotheses and makes claims that are really not supported by the evidence they provide," Diana Fleischman, a psychologist at the University of Portsmouth, told the International Business Times.

Beyond the online outrage, there are several questions not addressed by the study. While bisexuals are potentially attractive, what about strictly lesbian women, with no interest in reproducing with men how did they survive? Or homosexual and bisexual men, who, as the study suggests, hold no premium as partners for women looking to reproduce? Also, how transferable are the modern-day attitudes towards lesbians to prehistoric times and relationship models?

I believe also that there are additional factors that need to be taken into consideration if same-sex attraction in women is to be understood, admitted Apostolou to Pink News. The publication of my theory gives the opportunity for a fruitful academic dialogue, where another scholar may attempt to refute, alter, or expand it and replicate my findings.

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Ethiopia’s ‘Dikika Baby’ offers clues to human evolution | The … – The Columbian

Posted: at 10:41 pm

A A

The fossilized piece of a cheek bone was spotted in a chunk of sandstone sticking out of the dirt in the scorching badlands of northeastern Ethiopia.

Zeresenay Alemseged knew almost immediately that he had stumbled upon something momentous.

The cheekbone led to a jaw, portions of a skull and eventually collar bones, shoulder blades, ribs and perhaps most important the most complete spinal column of any early human relative ever found.

Nearly 17 years later, the 3.3-million-year-old fossilized skeleton known as the Dikika Baby remains one of the most important discoveries in archaeology, one that is filling in the timeline of human evolution.

When you put all the bones together, you have over 60 percent of a skeleton of a child dating back to 3.3 million years ago, which is more complete than the famous australopithecine fossil known as Lucy,' Alemseged, a 47-year-old professor of organismal biology and anatomy at the University of Chicago, told The Washington Post. We never had the chance to recover the face of Lucy, but the Dikika child is an almost complete skeleton, which gives you an impression of how children looked 3.3 million years ago.

The fossil, also called Selam peace in the Ethiopian Amharic language has revealed numerous insights into our early human relatives. But Alemseged said one of the most startling findings comes from the toddlers spine, which had an adaptation for walking upright that had not been seen in such an old skeleton.

The result, he said, is a creature whose upper body was apelike, but whose pelvis, legs and feet had humanlike adaptations.

If you had a time machine and saw a group of these early human relatives, what you would have said right away is, What is that chimpanzee doing walking on two legs? Alemseged said.

The findings, published this week in the Proceedings of the National Academy of Sciences, show for the first time the spinal column was humanlike in its numbering and segmentation. Though scientists know that even older species were bipedal, researchers said Selams fossilized vertebrae is the only hard evidence of bipedal adaptations in an ancient hominid spine.

Yes, there were other bipedal species before, but what is making this unique is the preservation of the spine, which simply is unprecedented, Alemseged said. Not only is it exquisitely preserved, but it also tells us that the human-type of segmentation emerged at least 3.3 million years ago. Could there have been other species with a similar structure, yes, but we dont know for sure.

Human beings share many of the same spinal structures as other primates, but the human spine which has more vertebrae in the lower back, for example is adapted for walking and running on two feet.

Among the larger questions researchers are trying to answer include: When did our ancestors evolve the ability to be bipedal? When did we become more bipedal than arboreal, or tree-dwelling? And when did our ancestors abandon an arboreal lifestyle to become the runners and walkers that eventually populated Africa and then the world?

One of the barriers to those questions is that complete sets of vertebrae are rarely preserved.

Though he has been studying Selam for nearly two decades, Alemseged thinks the fossil has more secrets to share.

I dont think she will stop surprising us as the analysis continues, he said. Science and tech is evolving so much that Im sure in a few years well be able to extract even more information that were not able to extract today.

For many years we have known of fragmentary remains of early fossil species that suggest that the shift from rib-bearing, or thoracic, vertebrae to lumbar, or lower back, vertebrae was positioned higher in the spinal column than in living humans, but we have not been able to determine how many vertebrae our early ancestors had, said Carol Ward, a curators distinguished professor of pathology and anatomical sciences in the University of Missouri School of Medicine, and lead author on the study. Selam has provided us the first glimpse into how our early ancestors spines were organized.

Unpacking the intricacies of Selams spinal structure would not have been possible without the assistance of cutting-edge technology, researchers said.

After 13 years of using dental tools to painstakingly remove portions of the fossil from sandstone which risked destroying the fossil Alemseged packed up Selam in his suitcase and took the fossil from Ethiopia to the European Synchrotron Radiation Facility in Grenoble, France, in 2010. Alemseged and the research team spent nearly two weeks there using high-resolution imaging technology to visualize the bones.

The fossil had undergone a medical CT scan in 2002 in Nairobi, Alemseged said, but that scanner was unable to distinguish objects with the same density, meaning that penetrating bones encased in sandstone was impossible. Once in France, that was no longer a problem, and the results, he said, were mind-blowing.

We were able to separate, virtually, the different elements of the vertebrae and were able to do it, of course, without any damage to the fossil, Alemseged said. We are now able to see this very detailed anatomy of the vertebrae of this exceptionally preserved fossil.

The scans revealed that the child possessed the thoracic-to-lumbar joint transition found in other fossil human relatives, but they also showed that Selam had a smaller number of vertebrae and ribs than most apes have.

For researchers, the skeleton is a window into the transition between rib-bearing vertebrae and lower back vertebrae, which allowed our early human ancestors to extend at the waist and begin moving upright, eventually becoming highly efficient walkers and runners.

Though he has been studying Selam for nearly two decades, Alemseged thinks the fossil has more secrets to share with the modern world.

I dont think she will stop surprising us as the analysis continues, he said. Science and tech is evolving so much that Im sure in a few years well be able to extract even more information that were not able to extract today.

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Super Soaker Inventor Takes Aim at Funding High School Robotics Teams – NBCNews.com

Posted: at 10:40 pm

He created one of the most popular toys on the planet but the inventor of the "Super Soaker" isn't done making a splash.

Lonnie Johnson is now focusing on new battery technology, but his most rewarding pursuit may be sharing his knowledge with a new generation of engineers.

The mild-mannered Johnson grew up in Mobile, Alabama at the height of the civil rights movement.

"There was a lot of fear, a lot of anxiety, a lot of stress," he remembered. "When I was a child the 'White-only' bathrooms were still very prevalent."

He turned that fear into motivation and a career as a NASA rocket scientist. But his "a-ha" moment came unexpectedly while he was designing a water pump. He had built testing the pump out in a bathroom when he noticed something.

"I thought to myself, 'Geez, this would make a neat water gun!'" he said. "At that point I decided to put my engineering hat on and design a high performance water gun."

That idea would change his life.

He built the first prototype for what became "The Super Soaker."

The toy, which first went on sale in the early 1990's, eventually topped $1 billion in sales. Johnson also went on to come up with the NERF gun and other toys.

"It's interesting that the Super Soaker gets so much attention," he said. "I really like to think of myself as a serious engineer!"

Now, he's getting serious about giving back. His nonprofit helps fund high school robotics teams. One of them the DISCbots from the nearby DeKalb International Student Center is made up of refugees from nine countries.

Kalombo Mukuca fled the Central African Republic a year ago. "Even babies -- they kill them," he said. "So we don't want to get killed."

Emanuel Tezera came to the United States from Ethiopia. "I want to fix something in this world," he said.

Incredibly, in just its second year, the DISCbots qualified for the world-wide robotics competition in Texas.

For Johnson, this idea may be his most rewarding.

"If I can have a positive impact," he said, "clearly it's something I want to do."

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Announcing the agenda for TechCrunch Sessions: Robotics … – TechCrunch

Posted: at 10:40 pm

TechCrunch is holding its first ever event focused solely on robotics on July 17 at MITs Kresge Auditorium in Cambridge, Mass., and today were really pleased to roll out the agenda forTC Sessions: Robotics.

The events purpose is to convene two very different worlds in robotics the nascent startup and venture scene and the deeply established research, government and corporate worlds. We think weve got our arms around all that and more. Anyone who attends TC Sessions: Robotics will learn how tomorrows robotics companies and technologies are going to populate our workplaces, homes, and everything in between while also learning where to make smart bets for employment, investment and education.

The agenda is packed with the top scientists, executives and companies in the robotics world. And its not done yet. Look for announcements in the coming days ofworkshops, a few remaining speakers, and our pitch-off contestants.

Please set aside July 17 and join TechCrunch, our speakers, and attendees for an amazing day of robotics. Get your tickets while they last. Interested in sponsorship? More information is available here.General questions?Reach out here.

9:00 AM 9:05 AM Opening Remarks fromMatthew Panzarino

9:05 AM 9:25 AM Whats Next at MITs Computer Science and Artificial Intelligence Laboratory withDaniela Rus (MIT CSAIL)

9:25 AM 9:50 AM Is Venture Ready for Robotics?withManish Kothari (SRI), Josh Wolfe (Lux Capital) and Helen Zelman (Lemnos)

10:10 AM 10:35 AM Collaborative Robots At WorkwithClara Vu (VEO), Jerome Dubois (6 River Systems) and Holly Yanco (UMass Lowell)

10:35 AM 10:55 AM Coffee Break

10:55 AM 11:20 AM Building A Robotics Startup from Angel to Exit with Helen Greiner (CyPhy Works),Andy Wheeler (GV) and Elaine Chen (Martin Trust Center for MIT Entrepreneurship)

11:20 AM 11:30 AM Soft Robotics (Carl Vause) Demo

11:30 AM 11:55 AM Re-imagineering Disney Robotics with Martin Buehler (Disney Imagineering)

12:00 PM 1:00 PM Lunch and Workshops TBA

1:00 PM 1:20 PM Robots at Amazonwith Tye Brady (Amazon Robotics)

1:20 PM 1:55 PM When Robots Fly with Buddy Michini (Airware), Andreas Raptopoulos (Matternet) and Anil Nanduri (Intel)

1:55 PM 2:15 PM Packbot, Roomba and Beyondwith Colin Angle (iRobot)

2:15 PM 2:35 PM Building Better BionicsSamantha Payne (Open Bionics) and TBA

2:35 PM 2:45 PM Demo TBA

2:45 PM 3:05 PM The Future of Industrial Robotics with Sami Atiya (ABB)

3:05 PM 3:25 PM Coffee Break

3:25 3:35 PM Demo TBA

3:35 PM 4:15 PM Robotics Startup Pitch-off (Judges and contestants TBA)

4:15 PM 4:35 PM The Age Of The Household RobotwithGill Pratt (Toyota Research Institute)

4:35 PM 4:55 PM Building The Robot Brain withHeather Ames (Neurala) andBrian Gerky (OSRF) and TBA

4:55 PM 5:20 PM Robots, AI and HumanitywithDavid Barrett (Olin), David Edelman (MIT) and Dr. Brian Pierce (DARPA) and TBA

5:20 PM 5:25 PM Wrap Up

5:25 PM -7:00 PM Reception

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The No. 1 industry being threatened by robots – MarketWatch

Posted: at 10:40 pm

The robot revolution may not have replaced us yet, but automation is undoubtedly creeping its way into many careers.

Hundreds of jobs now require some level of robotics skills, a new analysis from career website Zippia found. Nearly 1,000 job titles now have robotics-related requirements, the study found, which it defined as degree of autonomy, a set of intended tasks, and ability to function without human intervention. Of 985 such jobs it found in its database, 492 job titles were listed multiple times in fields that had robotics-related requirements.

The manufacturing industry has already been hit by automation, which has impacted employment in the U.S. auto industry. But what other industries are next?

The health field is particularly at risk, with the highest share 68 positions on its list. The job where youll most likely have to work with a robot? Decal applicator, which entails affixing labels to a number of products, including bikes, cars and bottles. It found the category had 2,711 listings involving robotics almost four times as many as any other job. This doesnt mean robots have taken over those jobs, only that they are assisting some have suggested the robot revolution could lead to higher wages in industries where automation takes over.

Here are the job titles that most require candidates to interact with robots and automation, according to Zippia. decal applicators, dermatologists, applied anthropologists, urologists, computer-aided drafters, tank drivers, indirect fire infantrymen and women, robotic welders and robotics engineers.

Technology entrepreneurs like Mark Zuckerberg, chief executive of Facebook FB, and Bill Gates, co-founder of Microsoft MSFT, +0.37% have warned about the threat of automation and artificial intelligence stealing tens of millions of jobs. A total of 25 million jobs will be? eliminated by technology by 2027, a study from market research company Forrester Research found, and a separate study from economists from the Massachusetts Institute of Technology and Boston University argued that six workers will lose their positions for every robot added.

However, the automation revolution isnt all bad for human workers: 15 million new jobs will be created in the U.S. over the next decade as a result of technology and 25% of jobs will be transformed, and not replaced. These positions are largely in finance, medicine and farming, the study found.

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Lego’s new programmable robotics kit is up for preorder – The Verge

Posted: at 10:40 pm

Lego just opened preorders for Lego Boost, the simple programmable robotics kit it announced early this year. The $159.99 kit includes two motors, a color and distance sensor, and the parts needed to build a Lego cat, robot, guitar, vehicle, or imitation 3D printer. Kids can control their creations with an Android or iOS app, using a basic drag-and-drop programming system. Preorders will begin shipping in late July.

Boost is one of several options for programmable Lego. Outside the well-known Lego Mindstorms, theres also the educational WeDo platform, as well as newly announced support for Apples educational programming app, Swift Playgrounds. Boosts text-free drag-and-drop programming is designed for younger children than Mindstorms is, and its meant to be more for play than education. We tried it at CES, and while its far more limited than something like Mindstorms (and costs a lot of money), its also pretty fun!

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Apple brings dancing robots and backflipping drones into Swift Playgrounds – TechCrunch

Posted: at 10:40 pm

Code rules everything around me. And you.

Really: be it the stoplight you stared at this morning, or the train you rode in on, or the lil robot vacuum keeping your floor ever-so-slightly cleaner while youre away, code is everywhere.

But even for people whove put the time in to learn to program, jumping from software to hardware can be a challenge even if said challenge is just figuring out where to start. How do you program something real? How do you build something that moves?

Apple is taking steps to tackle that problem by bringing third-party hardware think robots, drones, and musical instruments into its learn-to-code platform, Swift Playgrounds.

Unfamiliar with Swift Playground? Thats okay its only about a year old. Swift Playgrounds is an iPad app that Apple built to teach people (not just kids, Apple notes whenever talking about it) to code. On one half of the screen, users write code actual, live, Swift code (albeit code thats generally executing on top of a more complicated engine behind the curtain) to complete challenges. On the other half, said code runs at the tap of a button. One lesson might have you move a character around a board one step at a time to teach you how functions work; another might have you tweak the mechanics of a brick breaker game to teach you about variables.

A little over a million people have used Swift Playgrounds since launch, Apple tells me. With todays news, Apple is working with a handful of companies to bring hardware into the mix. Folks like:

Some of these teams had already started tapping into Swift Playgrounds on their own, with Apple having opened Playgrounds content creation to third party developers from the beginning the aforementioned Wonder Workshop, for example, has been offering Swift Playground lessons for a few months now. Apple embracing the integrations really just formalizes thing, makes it simpler to tie third-party Bluetooth devices into Swift Playgrounds, and adds a bunch of support from Apples end.

This is a smart move on Apples part, and one thats pretty characteristic for the company. Apple has used education as a foot-in-the-door (with varying degrees of success) for decades, from sending Apple Is to schools in the 70s (to prove their prowess over the big ol mainframes of the time) to donating tens of thousands of iPads to schools just last year.

But this move potentially helps them introduce themselves to a new level of student the budding hardware engineer early on.

Take the LEGO Mindstorms integration, for example. Mindstorms is already used in robotics clubs around the world.

LEGO already has its own development tools for Mindstorms, including one for the iPad. But now they get a solid, ultra newbie-friendly coding platform in Swift Playgrounds. One with its own teaching platform built right in, and one where the most complicated bits of the system (the underlying engine) are largely maintained by Apple.

Apple, meanwhile, gets to pop up in those aforementioned robotics clubs (the stomping grounds of many a lifelong engineer) and say Hey kids! Learning your first programming language to make that robot dance? Check out our programming language, Swift! Oh, and do it on an iPad!

It all just makes sense.

These new third-party tie-ins will start working with the release of Swift Playgrounds 1.5, which Apple tells me should hit the App Store on June 5th.

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‘Swarmathon’ Robotics Team Competes at Cape Canaveral – UC Merced University News

Posted: at 10:40 pm

The future of robotics is not in using one super-powerful robot for all tasks, but rather to use a coalition of simpler robots collaboratively, Carpinexplained.

Todays engineers, drawing inspiration from nature, design cooperative robots to accomplish tasks impossible for individualrobots.

A lot of the ideas implemented in robots are inspired by biological algorithms, Meraz explained. How do ants forage for food? And how do you translate those foraging algorithms torobots?

But why ants? Ant societies exhibit efficient group problem solving. A kind of higher intelligence, absent in solitary ants, emerges from the swarm. Some biologists even refer to ant societies assuperorganisms.

Essentially, you can look at the swarm as a single organism with distributed sensors that are all communicating with each other, Merazexplained.

This is what NASA wants from Swarmies cooperative rovers that mimic the efficient foraging behavior of antswarms.

With this in mind, UC Merceds team comprised of Meraz, Jose Manuel Gonzalez Hermosillo, Jesus Sergio Gonzalez Castellon, Navvaran Mann, James Nho, Jesus Salcedo and Carlos Diaz developed code to turn their trio of Swarmies into a tiny colony of roboticants.

But this was no easy task. Nor was it their only obligation. NASA also requires Swarmathon teams to engage inoutreach.

The team worked with students from Atwaters Buhach Colony High School to build SumoBots. As the name suggests, SumoBots are robots designed to push each other around, the winner being the SumoBot that forces its opponent out of thering.

But for many involved, the highlight of the year was the Swarmathon itself. Six team members traveled to NASAs Kennedy Space Center to compete. This was the first year UC Merced participated in the 2-year-oldevent.

Pitted against 18 other teams, UC Merced came in 11thoverall.

We spent a lot of time on this, and it was really hard, Meraz said What we thought wed progress to and what we did progress to were verydifferent.

However, the team did not come away empty-handed. They won second prize for their technical report describing the methods, experiments and results of their efforts. They also won third prize for their outreach report, which documented their work at BuhachColony.

Plus, Swarmathon helped two team members secure coveted summer internships. Meraz was invited to spend the summer in the lab of Melanie Moses, the UNM robotics professor who oversees Swarmathon, while Diaz and Gonzalez will stay on campus to work in Carpins lab on a project funded byUSDA/NIFA.

And Meraz and company have no plans to quitnow.

We are definitely competing again next year, Meraz said. I've already recruited a few of the top students that were in my Intro to Robotics course with Stefano Carpin, so we will go in with much moreexperience.

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Why Rat-Brained Robots Are So Good at Navigating Unfamiliar Terrain – IEEE Spectrum

Posted: at 10:40 pm

3.Engineering Cognition Photo: Dan Saelinger

If you take a common brown rat and drop it into a lab maze or a subway tunnel, it will immediately begin to explore its surroundings, sniffing around the edges, brushing its whiskers against surfaces, peering around corners and obstacles. After a while, it will return to where it started, and from then on, it will treat the explored terrain as familiar.

Roboticists have long dreamed of giving their creations similar navigation skills. To be useful in our environments, robots must be able to find their way around on their own. Some are already learning to do that in homes, offices, warehouses, hospitals, hotels, and, in the case of self-driving cars, entire cities. Despite the progress, though, these robotic platforms still struggle to operate reliably under even mildly challenging conditions. Self-driving vehicles, for example, may come equipped with sophisticated sensors and detailed maps of the road ahead, and yet human drivers still have to take control in heavy rain or snow, or at night.

The lowly brown rat, by contrast, is a nimble navigator that has no problem finding its way around, under, over, and through the toughest spaces. When a rat explores an unfamiliar territory, specialized neurons in its 2-gram brain fire, or spike, in response to landmarks or boundaries. Other neurons spike at regular distancesonce every 20 centimeters, every meter, and so oncreating a kind of mental representation of space [PDF]. Yet other neurons act like an internal compass, recording the direction in which the animals head is turned [PDF]. Taken together, this neural activity allows the rat to remember where its been and how it got there. Whenever it follows the same path, the spikes strengthen, making the rats navigation more robust.

So why cant a robot be more like a rat?

The answer is, it can. At the Queensland University of Technology (QUT), in Brisbane, Australia, Michael Milford and his collaborators have spent the last 14 years honing a robot navigation system modeled on the brains of rats. This biologically inspired approach, they hope, could help robots navigate dynamic environments without requiring advanced, costly sensors and computationally intensive algorithms.

An earlier version of their system allowed an indoor package-delivery bot to operate autonomously for two weeks in a lab. During that period, it made more than 1,100 mock deliveries, traveled a total of 40 kilometers, and recharged itself 23 times. Another version successfully mapped an entire suburb of Brisbane, using only the imagery captured by the camera on a MacBook. Now Milfords group is translating its rat-brain algorithms into a rugged navigation system for the heavy-equipment maker Caterpillar, which plans to deploy it on a fleet of underground mining vehicles.

Milford, whos 35 and looks about 10 years younger, began investigating brain-based navigation in 2003, when he was a Ph.D. student at the University of Queensland working with roboticist Gordon Wyeth, whos now dean of science and engineering at QUT.

At the time, one of the big pushes in robotics was the kidnapped robot problem: If you take a robot and move it somewhere else, can it figure out where it is? One way to solve the problem is SLAM, which stands for simultaneous localization and mapping. While running a SLAM algorithm, a robot can explore strange terrain, building a map of its surroundings while at the same time positioning, or localizing, itself within that map.

Wyeth had long been interested in brain-inspired computing, starting with work on neural networks in the late 1980s. And so he and Milford decided to work on a version of SLAM that took its cues from the rats neural circuitry. They called it RatSLAM.

There already were numerous flavors of SLAM, and today they number in the dozens, each with its own advantages and drawbacks. What they all have in common is that they rely on two separate streams of data. One relates to what the environment looks like, and robots gather this kind of data using sensors as varied as sonars, cameras, and laser scanners. The second stream concerns the robot itself, or more specifically, its speed and orientation; robots derive that data from sensors like rotary encoders on their wheels or an inertial measurement unit (IMU) on their bodies. A SLAM algorithm looks at the environmental data and tries to identify notable landmarks, adding these to its map. As the robot moves, it monitors its speed and direction and looks for those landmarks; if the robot recognizes a landmark, it uses the landmarks position to refine its own location on the map.

But whereas most implementations of SLAM aim for highly detailed, static maps, Milford and Wyeth were more interested in how to navigate through an environment thats in constant flux. Their aim wasnt to create maps built with costly lidars and high-powered computersthey wanted their system to make sense of space the way animals do.

Rats dont build maps, Wyeth says. They have other ways of remembering where they are. Those ways include neurons called place cells and head-direction cells, which respectively let the rat identify landmarks and gauge its direction. Like other neurons, these cells are densely interconnected and work by adjusting their spiking patterns in response to different stimuli. To mimic this structure and behavior in software, Milford adopted a type of artificial neural network called an attractor network. These neural nets consist of hundreds to thousands of interconnected nodes that, like groups of neurons, respond to an input by producing a specific spiking pattern, known as an attractor state. Computational neuroscientists use attractor networks to study neurons associated with memory and motor behavior. Milford and Wyeth wanted to use them to power RatSLAM.

They spent months working on the software, and then they loaded it into a Pioneer robot, a mobile platform popular among roboticists. Their rat-brained bot was alive.

But it was a failure. When they let it run in a 2-by-2-meter arena, Milford says, it got lost even in that simple environment.

Milford and Wyeth realized that RatSLAM didnt have enough information with which to reduce errors as it made its decisions. Like other SLAM algorithms, it doesnt try to make exact, definite calculations about where things are on the map its generating; instead, it relies on approximations and probabilities as a way of incorporating uncertaintiesconflicting sensor readings, for examplethat inevitably crop up. If you dont take that into account, your robot ends up lost.

That seemed to be the problem with RatSLAM. In some cases, the robot would recognize a landmark and be able to refine its position, but other times the data was too ambiguous. After not too long, the accrued error was bigger than 2metersthe robot thought it was outside the arena!

In other words, their rat-brain model was too crude. It needed better neural circuitry to be able to abstract more information about the world.

So we engineered a new type of neuron, which we called a pose cell, Milford says. The pose cell didnt just tell the robot its location or its orientation, it did both at the same time. Now, when the robot identified a landmark it had seen before, it could more precisely encode its place on the map and keep errors in check.

Again, Milford placed the robot inside the 2-by-2-meter arena. Suddenly, our robot could navigate quite well, he recalls.

Interestingly, not long after the researchers devised these artificial cells, neuroscientists in Norway announced the discovery of grid cells, which are neurons whose spiking activity forms regular geometric patterns and tells the animal its relative position within a certainarea. [For more on the neuroscience of rats, see AI Designers Find Inspiration in Rat Brains.]

Our pose cells werent exactly grid cells, but they had similar features, Milford says. That was rather gratifying.

The robot tests moved to bigger arenas with greater complexity. We did a whole floor, then multiple floors in the building, Wyeth recalls. Then I told Michael, Lets do a whole suburb. I thought he would kill me.

Milford loaded the RatSLAM software into a MacBook and taped it on the roof of his red 1994 Mazda Astina. To get a stream of data about the environment, he used the laptops camera, setting it to snap a photo of the street ahead of the car several times per second. To get a stream of the data about the robot itselfin this case, his carhe found a creative solution. Instead of attaching encoders to the wheels or using an IMU or GPS, he used simple image-processing techniques. By tracking and comparing pixels on sequences of photos from the MacBook, his SLAM algorithm could calculate the vehicles speed as well as direction changes.

Milford drove for about 2 hours through the streets of the Brisbane suburb of St. Lucia [PDF], covering 66 kilometers. The result wasnt a precise, to-scale map, but it accurately represented the topology of the roads and could pinpoint exactly where the car was at any given moment. RatSLAM worked.

It immediately drew attention and was widely discussed because it was very different from what other roboticists were doing, says David Wettergreen, a roboticist at Carnegie Mellon University, in Pittsburgh, who specializes in autonomous robots for planetary exploration. Indeed, its still considered one of the most notable examples of brain-inspired robotics.

But though RatSLAM created a stir, it didnt set off a wave of research based on those same principles. And when Milford and Wyeth approached companies about commercializing their system, they found many keen to hear their pitch but ultimately no takers. A colleague told me we should have called it NeuroSLAM, Wyeth says. People have bad associations with rats.

Thats why Milford is excited about the two-year project with Caterpillar, which began in March. Ive always wanted to create systems that had real-world uses, he says. It took a lot longer than I expected for that to happen.

We looked at their results and decided this is something we could get up and running quickly, Dave Smith, an engineer at Caterpillars Australia Research Center, in Brisbane, tells me. The fact that its rat inspired is just a cool thing.

Underground mines are among the harshest man-made places on earth. Theyre cold, dark, and dusty, and due to the possibility of a sudden collapse or explosion, theyre also extremely dangerous. For companies operating in such an extreme environment, improving their ability to track machines and people underground is critical.

In a surface mine, youd simply use high-precision differential GPS, but that obviously doesnt work below ground. Existing indoor navigation systems, such as laser mapping and RF networks, are expensive and often require infrastructure thats difficult to deploy and maintain in the severe conditions of a mine. For instance, when Caterpillar engineers considered 3D lidar, like the ones used on self-driving cars, they concluded that none of them can survive underground, Smith says.

One big reason that mine operators need to track their vehicles is to plan how they excavate. Each day starts with a dig plan that specifies the amount of ore that will be mined in various tunnels. At the end of the day, the operator compares the dig plan to what was actually mined, to come up with the next days dig plan. If youre feeding in inaccurate information, your plan is not going to be very good. You may start mining dirt instead of ore, or the whole tunnel could cave in, Smith explains. Its really important to know what youve done.

The traditional method is for the miner to jot down his movements throughout the day, but that means he has to stop what hes doing to fill out paperwork, and hes often guessing what actually occurred. The QUT navigation system will more accurately measure where and how far each vehicle travels, as well as provide a reading of where the vehicle is at any given time. The first vehicle will drive into the mine and map the environment using the rat-brain-inspired navigation algorithm, while also gathering images of each tunnel with a low-cost 720p camera. The only unusual feature of the camera is its extreme ruggedization, which Smith says goes well beyond military specifications.

Subsequent vehicles will use those results to localize themselves within the mine, comparing footage from their own cameras with previously gathered images. The vehicles wont be autonomous, Milford notes, but that capability could eventually be achieved by combining the camera data with data from IMUs and other sensors. This would add more precision to the trucks positioning, allowing them to drive themselves.

The QUT team has started collecting data within actual mines, which will be merged with another large data set from Caterpillar containing about a thousand hours of underground camera imagery. They will then devise a preliminary algorithm, to be tested in an abandoned mine somewhere in Queensland, with the help of Mining3, an Australian mining R&D company; the Queensland government is also a partner on the project. The system could be useful for deep open-pit mines, where GPS tends not to work reliably. If all goes well, Caterpillar plans to commercialize the system quickly. We need these solutions, Smith says.

For now, Milfords team relies on standard computing hardware to run its algorithms, although they keep tabs on the latest research in neuromorphic computing. Its still a bit early for us to dive in, Milford says. Eventually, though, he expects his brain-inspired systems will map well to neuromorphic chip architectures like IBMs True North and the University of Manchesters SpiNNaker. [For more on these chips, see Neuromorphic Chips Are Destined for Deep Learningor Obscurity, in this issue.]

Will brain-inspired navigation ever go mainstream? Many developers of self-driving cars, for instance, invest heavily in creating detailed maps of the roads where their vehicles will drive. The vehicles then use their cameras, lidars, GPS, and other sensors to locate themselves on the maps, rather than having to build their own.

Still, autonomous vehicles need to prove they can drive in conditions like heavy rain, snow, fog, and darkness. They also need to better handle uncertainty in the data; images with glare, for instance, might have contributed to a fatal accident involving a self-driving Tesla last year. Some companies are already testing machine-learning-based navigation systems, which rely on artificial neural networks, but its possible that more brain-inspired approaches like RatSLAM could complement those systems, improving performance in difficult or unexpected scenarios.

Carnegie Mellons Wettergreen offers a more tantalizing possibility: giving cars the ability to navigate to specific locations without having to explicitly plan a trajectory on a city map. Future robots, he notes, will have everything modeled down to the millimeter. But I dont, he says, and yet I can still find my way around. The human brain uses different types of models and mapssome are metric, some are more topological, and some are semantic.

A human, he continues, can start with an idea like Somewhere on the south side of the city, theres a good Mexican restaurant. Arriving in that general area, the person can then look for clues as to where the restaurant may be. Even the most capable self-driving car wouldnt know what to do with that kind of task, but a more brain-inspired system just might.

Some roboticists, however, are skeptical that such unconventional approaches to SLAM are going to pay off. As sensors like lidar, IMUs, and GPS get better and cheaper, traditional SLAM algorithms will be able to produce increasingly accurate results by combining data from multiple sources. People tend to ignore the fact that SLAM is really a sensor fusion problem and that we are getting better and better at doing SLAM with lower-cost sensors, says Melonee Wise, CEO of Fetch Robotics, a company based in San Jose, Calif., that sells mobile robots for transporting goods in highly dynamic environments. I think this disregard causes people to fixate on trying to solve SLAM with one sensor, like a camera, but in todays low-cost sensor world thats not really necessary.

Even if RatSLAM doesnt become practical for most applications, developing such brainlike algorithms offers us a window into our own intelligence, says Peter Stratton, a computer scientist at the Queensland Brain Institute who collaborates with Milford. He notes that standard computings von Neumann architecture, where the processor is separated from memory and data is shuttled between them, is very inefficient.

The brain doesnt work anything like that. Memory and processing are both happening in the neuron. Its computing with memories, Stratton says. A better understanding of brain activity, not only as it relates to responses to stimuli but also in terms of its deeper internal processesmemory retrieval, problem solving, daydreamingis whats been missing from past AI attempts, he says.

Milford notes that a lot of types of intelligence arent easy to study using only animals. But when you observe how rats and robots perform the same tasks, like navigating a new environment, you can test your theories about how the brain works. You can replay scenarios repeatedly. You can tinker and manipulate your models and algorithms. And unlike with an animal or an insect brain, he says, we can see everything in a robots brain.

This article appears in the June 2017 print issue as Navigate Like a Rat.

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Why Rat-Brained Robots Are So Good at Navigating Unfamiliar Terrain - IEEE Spectrum

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