Hi, I'm Wendy Zuckerman and you're listening to Science Versus from Gimlett Media.

This is the show that pits facts against flying through space.

On today's show, we're doing something a little different to what we usually do, and we're

spending the episode talking to astronauts Scott Kelly.

A few years ago, NASA sent Scott to live on the International Space Station for about

a year. That's the longest stretch ever, NASA.

And his story captured the world's attention.

Scott Kelly sent an American record with his 340-day mission to the International Space Station.

The astronaut Scott Kelly prendra Sarotrette, the first avril.

Rocket man, Scott Kelly, finally back on Earth this morning.

The astronaut logging almost 144 million miles.

Yes, Scott Kelly spent 340 days living in a metal container orbiting around Earth.

And while he was up there, scientists analyzed every last inch of him, from his bones to his muscles,

and even his DNA.

And they were trying to find out what being in space for so long can do to the human body.

NASA scientists were particularly excited to use Scott as their guinea pig, because he has

an identical twin brother, Mark, who's also an astronaut.

And Mark would stay back on Earth so scientists could compare them.

We'll get to all of that science in a bit, because Scott told us that at first, when

he decided to become an astronaut, he was pretty much just in it for the adventure.

When the solid rocket motors light, 7 million pounds of thrust absolutely gets your attention.

What's firing up your ass?

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