You have to go ashore. Meet Pakicetus. The very first whale. Life on Earth spent millions of years clawing its way out of the oceans. But whales took all that effort and threw it out the window.

They include some of the largest animals on Earth. The blue whale is the ... It must swim to the surface immediately for its ...

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Whales are a group of mammals that live in oceans. They include some of the largest animals on Earth. The blue whale is the biggest animal that has ever existed. Whales can be found in every ocean ...

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 ...

Beaked whales can dive 2,000 metres below the ocean's surface. Why and how do they do it? Around 2,000 metres below the surface, the water is freezing, black and seemingly impenetrable. No light ...