How does an ostrich sleep? Almost imperceptibly, it seems. Even though an ostrich might be sound asleep, it can look wide awake or, at most, a little drowsy. John Lesku from the Max Planck Institute of Ornithology discovered this by fitting six ostrichers with “Neurologgers”, electrode-laden helmets that measures their temperature, brain activity, eye movements and neck muscle contractions.
The video above shows three of the birds cycling through two different types of sleep. The first is called ‘slow wave sleep’ or SWS, where the ostriches’ brain waves are slow and strong. Even though this is typically known as deep sleep, the birds look alert. They stay still, but their eyes are open and their necks upright. Nonetheless, the readings from the Neurologgers clearly showed that they were asleep.
In the second phase, known as ‘rapid eye movement’ or REM sleep, the ostriches’ brain waves are fast and weaker. Now, the birds shut their eyes, which move rapidly behind closed eyelids. They necks also start to droop and sway, righting themselves with awkward jerks like people falling asleep at a talk. Biologists have previously interpreted this as a sign of a tired ostrich. That’s partly right, although the animal ...









Keith's note: I have lost count how many times people at NASA have told me that they cannot self-promote, advertise, lobby, or otherwise try to use standard marketing tools to inform the public of the things that they do. They always cite dire Congressional prohibitions against such activities. Then they go off and totally violate these prohibitions with advertising procurements such as this one. I am not certain that they actually know what it is they are allowed or not allowed to do and just throw this answer out when they do not want to do something.
Keith's 24 Aug note: According to a 

Keith's note: Either Sen. Hutchison and her staff have problems with the English language or they are deliberately parsing/misrepresenting what the cost report (one with no actual costs included) actually said with regard to NASA's SLS cost estimates. Such deliberate and blatant misrepresentations are deceptive and not in the public interest. In addition, she openly admits that NASA did not provide everything that Booz Allen Hamilton needed, but that's apparently OK with her so long as they gave her enough words like "reasonable" etc. to selectively quote to push her political position. This is crappy policy making in action.
