5 Things That Happen to Your Body in Space

Space travel leads to many changes in the human body. But if you’re planning an out-of-this-world trip, here are some of the things to expect.

Nice night for a stroll: Scott Kelly working outside the International Space Station in 2015. NASA

Tim Peake is the first official British astronaut to walk in space. The former Army Air Corps officer has spent a month in space, after blasting off on a Russian Soyuz rocket to the International Space Station on Dec. 15 last year, but the spacewalk will doubtless be his most grueling test.

Tim Peake prepares his Extravehicular Mobility Unit spacesuit. ESA/NASA, CC BY 4.0