Early whales gave birth on land

A 47.5 million year old fossil was discovered on Pakistan. The fossil was of an extinct pregnant female whale and a male of the same species. This discovery shows how whales gave birth and provide new insights into how whales made the transition from land to sea. H. Richard Lane said "This stunning discovery reinforces the belief that modern cetaceans originated from terrestrial ancestors. The species of the discovered fossil is the extinct species known as Archaeoceti. Paleontologist Philip Gingerich said that when he first saw the teeth of the new discoveries, he thought the fossil was a small adult whale. He now realizes that the ribs were too large to go with the teeth. By the end of the discovery day, he realized that the whale has a fetus. The whales big teeth indicated that they spent most of their lives in the sea, only coming on land to rest, mate, or give birth.
http://www.brightsurf.com/news/headlines/42913/early_whales_gave_birth_on_land.html