![Spacepod show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/068/533/small/spacepod.jpg)
Summary: Dr. Heather Kaluna talks about space weathering, which changes the surfaces of the moon, asteroids, and Mercury. She studies space weathering in a laboratory, where she can reproduce hundreds of millions of years of weathering in just forty minutes.