Forget all the scientific advances, the most popular question asked of astronauts is much more primal: How do you use the restroom? Suction is needed to counteract the lack of gravity, and it's not ...

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Though lined with high-tech equipment, Orion must also sustain four humans’ lives through 10 days.

Spending time on the International Space Station isn’t all fun and games. There is scientific research and engineering tests, but a great deal of time is required for maintaining the orbital outpost.