When you gotta go, you gotta go, and according to the “flush” counter on one of the International Space Station’s three toilets, astronauts have gone more than 40,000 times over the past 20 years.

This is one crappy challenge. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. It's no secret that humans poop — even in space. But the actual, ...

NASA on Thursday launched a crowdsourcing campaign offering $20,000 to the person who comes up with the best design for space toilets ahead of the agency’s 2024 flight to the Moon. The agency issued ...