Unlike today's whales, the Basilosaurus has a paddle-like fins similar to those of seals and long tails.
Researchers have recently discovered evidence of a giant living under the ocean more than 500 million years ago.
Scientists were extremely confused in explaining the cause of 75 whales in a desert about 1km from the sea.
A group of Argentinian and Swedish paleontologists has announced the discovery of the whale fossil, dating back to 49.5 million years ago - the oldest evidence of live mammals.
According to the results of fossil skeleton research of an ancient whale, scientists have come to the conclusion that the whale's skull is originally spiral.