Two Key Things Astronaut Scott Kelly's Body Will Teach Us About Living in Space

We’re all looking forward to interstellar travel and colonizing Mars, but first, we’ve got a lot to learn about how the human body responds to the cold dark void of outer space. Scott Kelly’s stint on the ISS, which ends tomorrow, is helping us answer some critical questions—including what weightlessness does to our…

Before Going To Space, Astronauts Had to Survive the Desert

No one knew if the first attempts at getting humans into space would crash catastrophically. Before any astronaut could leave the planet, NASA tested their capacity to survive a crash landing in a hostile environment by abandoning them in the desert with only a re-entry pod and parachute for company.

Fear of Irradiated Ladyparts Limits Missions for Female Astronauts

It’s hard enough to be an astronaut. You basically have to be a genius physical specimen with enough intelligence to understand astrophysics, but not enough self-awareness to fear being strapped to a rocket and hurled into low orbit by a column of fire. For aspiring female astronauts, though, the selection process…