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Pakicetus is an early ancestor of modern whales, existing around 50 million years ago, and was a land-dwelling creature resembling a large wolf with adaptations for living near water. Unlike modern whales, which are fully aquatic and have streamlined bodies, flippers, and blowholes, Pakicetus retained features for terrestrial life, such as legs and a more primitive skull structure. Over millions of years, evolutionary adaptations transformed its descendants into the fully aquatic cetaceans we know today. Thus, while Pakicetus is a crucial link in whale evolution, it is distinctly different in form and habitat from contemporary whales.

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