Crumbs—from bread, crackers, cookies, etc—don’t do well in space. They float around, and can fly into an astronaut’s eyes and interfere with important equipment. That’s why you’ll find tortillas used instead of bread on all crafts traveling out of orbit. Though the creation of crumb-free bread in 2017 means this rule could be changing soon. Don’t miss these mindblowing facts about the International Space Station.
A funny thing happens to carbonation without gravity—nothing. On Earth, a big part of soda’s appeal is in its effervescence, but with bubbles in a state of “free float,” fizzy drinks don’t fizz. As astronauts found out in the 1980s and ’90s when soda made brief appearances in space, warm, flat carbonated drinks don’t go down quite as easily as they do back home.