a prehistoric whale with a long snout and sharp, cutting teeth. These whales evolved from an even more ancient species of dog ...

Along with the bones of prehistoric sea monsters ... The common ancestor of whales and of all other land animals was a flatheaded, salamander-shaped tetrapod that hauled itself out of the sea ...

But the biggest development in the seas was the appearance of whales in the mid- to late Paleogene. The huge animals evolved from land mammals that took to the seas. Meanwhile, smaller reptiles ...

And although the geologists didn’t realize it at the time, the prehistoric ... The whales of Wadi Hitan had evolved to the point where they could not return to land. They were school bus-size ...

The very first “whales” were land animals that walked on four legs — small deer-like creatures, about the size of a house cat, that ate plants and waded around in prehistoric lagoons over 50 ...