How do flat rocks skip across water?

Throwing a flat rock juuust right so that it skips across the surface of a pond or river is super satisfying. How many hops can you get? Two? Seven? Sixty-five? But how does the right kind of throw cause a rock to NOT sink as soon as it touches the water? We asked Jon Lambert of Splash Lab to help us find the answer.  Got questions skipping through your brain? Send your questions to us at BrainsOn.org/contact, and we’ll throw you some answers. See omnystudio.com/listener for privacy information.