Almost all the asteroids between Jupiter and Mars are the remains of just 5 or 6 shattered protoplanets

Almost all the asteroids between Jupiter and Mars (hundreds of thousands of them!) are the remains of just 5 or 6 shattered protoplanets, according to a new study. https://t.co/5k6Uivryd6 pic.twitter.com/tJs3llNBDr

— Corey S. Powell (@coreyspowell) July 4, 2018