Amy Martinez

I mean, it does leave a big footprint.

But when it comes to the landscape of this place, how is the Olympics changing the landscape?

These projects, though, they're always sold as the benefit for the local area once the Olympics leave.

And that'll be something that they can leave behind.

But I mean, that sounds like it's going to be the legacy of these games for better or worse.

Wow.

The price of a pretty selfie.

It could be high, right?

That's NPR international correspondent Ruth Sherlock.

Ruth, thanks a lot.

Thank you very much.

If you've ever seen the movie Cool Runnings, you know one of the major risks of sliding down the ice in a bobsled is crashing.

These athletes are racing over 80, sometimes 90 miles an hour, and a crash is brutal on the body and brain.

But there's a lesser known risk that's catching the attention of scientists, and that is the phenomenon known as sled head.

Here's my conversation with Emily Kwong, co-host of NPR's Science Podcast, Shortwave.

All right, so Emily, besides bobsled, tell us about some of the other sliding sports.

Oh, they are very nice.

Yeah.

Wow.

Very arty.