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Whales share a common ancestor with land mammals, specifically artiodactyls, which are even-toed ungulates. This lineage can be traced back to a group of terrestrial mammals known as cetancodontophorids, which lived around 50 million years ago. Fossil evidence shows that early whale ancestors, like Pakicetus, were semi-aquatic and gradually evolved adaptations for life in water, leading to modern whales. This evolutionary transition illustrates the significant morphological and ecological changes that occurred over millions of years.

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2mo ago

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