Surprising footsteps in old sand

Today, a barefoot walk on one of the North Atlantic beaches of Nova Scotia is a chilly experience. But 350 million years ago, Nova Scotia lay near the Equator, and scientists have found thousands of footprints left by animals trundling across this tropical paradise.

To the scientists' surprise, the footprints, varying in length from half an inch to the size of a hand, were made by a wide range of feet, though all of them five-toed. Read more here.