National Geographic is airing the season premiere of Known Universe starting tonight at 9pm ET/PT. Astronaut Mike Massimino will be showing us what it is like to live in space. Including going to the bathroom.

Nat Geo always puts on quality programming, here’s an overview of the eight show series:

Will mankind be able to conquer space travel? Technological advancements could make it possible, but man’s own body may be what’s holding us back. Now, Known Universe examines humans’ space endurance. We’ll experience six G’s in a centrifuge to demonstrate extreme gravitational effects. Study gravity’s effects on seemingly simple human activities in space, from sleeping to sex, and eating to digestion. See how the vacuum of space and its near-zero pressure can kill us within minutes, if not seconds. We’ll look at the ever-present dangers of solar radiation and how this invisible threat may be our biggest obstacle to extended human missions to the planets and beyond.