Fossilized remains of a whale ancestor that lived 43 million years ago have recently been discovered in the Chilean desert and they show how whales evolved from land-dwelling creatures to the giant sea-dwelling mammals they are today. The fossil, which was studied by a team of international researchers, revealed that whales descended from a creature that was as small as a wolf and had feet and limbs that allowed it to both swim and walk on land. This is the first time that a species has been discovered that clearly shows the transition from land-dwelling creature to sea-dwelling whale. The discovery of this creature gives us a better understanding of the evolution of whales and how they came to inhabit the ocean.

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source: Phys.org