Instead, they use the blowholes on the top of their head to breathe air at the ocean's surface. Whales evolved from a deer-like land mammal called Pakicetus about 50 million years ago. A sperm whale's ...

Although whales are expert swimmers and perfectly adapted to life underwater, these marine mammals once walked on four legs. Their land-dwelling ancestors lived about 50 million years ago. Meet ...

PBS Nova explained how a small, furry prehistoric four-legged, semi-aquatic carnivore called the Pakicetus was a direct ...

Discovering this most primitive known whale, which Gingerich named Pakicetus, made him see whales in a new light. "I started thinking more and more about the huge environmental transition that ...

Let’s rewind the clock around 50 million years. No, you won’t find any whales here. You have to go ashore. Meet Pakicetus. The very first whale. Life on Earth spent millions of years clawing ...

A recent research revealed a remarkable story of whale evolution—how these magnificent ... being four-legged and furry creatures, such as Pakicetus, into completely aquatic animals.

It's the tale of an ancient land mammal making its way back to the sea, becoming the forerunner of today's whales. In doing so, it lost its legs, and all of its vital systems became adapted to a ...