So You’re Underwater: Why Do You See That Circle of Light Above You?
Have you ever sat on the bottom of a swimming pool and pondered your watery ceiling? Most of the surface is a sheet of light blue, and you can’t se…
Dot Physics
The Incredible Physics of Simone Biles’ Yurchenko Double Pike
Gymnastics is an extremely difficult sport, but some people make it look easy. Step forward Simone Biles, who hit a Yurchenko double pike—consider…