How to Poop on Earth

"I've got literally 700 questions off of Facebook and probably 20% of them that people just want to know how you poop, man," he says. "The good news is that humans are humans and the human body goes through some changes, but not pooping is not one of those changes." In orbit, astronauts use air flow to transport their solid waste into a bag that's perforated. Those buckets go on to a garbage or onto a cargo vehicle that is taking garbage back home.