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They we're called Pakicetus and unlike whales now, they have long skulls and large carnivorous teeth
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Unlike Indohyus and Pakicetus who mostly lived a typical land lifestyle, Ambulocetus looked like it lived a very aquatic lifestyle
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According to researchers, it evolved 50 million years ago
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There are a lot of factors like how their vertebre got longer because of living in the water for so long
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Whales that evolved after Ambulocetus are shown that they lived a more aquatic lifestyle than the early whales mentioned because of their high level of saltwater oxygen isotopes
