Echolocation (Physiology)

Indian writer Ved Mehta. He's written several books of autobiography, most all of which have been serialized in "The New Yorker" magazine. His autobiographies are poignant accounts of his blindness, his education in England, and the role that language came to play in his life.

We think of whales as creatures of the sea, but scientists now believe that 40 million to 50 million years ago, whales had four legs and lived at least part of their lives on land.