Melissa Block

Copyright 2018 NPR. To see more, visit http://www.npr.org/.

Copyright 2018 NPR. To see more, visit http://www.npr.org/.

Since she was a little girl, Ashley Caldwell has been in constant motion: jumping out of her crib, tumbling off the couch, leaping down stairs, flipping on a trampoline.

So it seems fitting that now, at 24, Caldwell is the reigning women's world champion in aerials skiing — a sport in which she somersaults and spins through the air, some 60 feet off the ground.

Remember this name: Maame Biney.

The short track speedskater just turned 18; she's not even out of high school. But she is already one of the biggest U.S. names at the Winter Olympics.

Copyright 2018 NPR. To see more, visit http://www.npr.org/.

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