a whale of a tale | whale 1970 Whale Whales are descendants of land-dwelling mammals of the artiodactyl order (even-toed ungulates). They are relevant to the Indohyus, an extinct chevrotain-like ungulate, from which they split approximately 48 , 000, 000 years ago.|19||20| Primitive cetaceans, or archaeocetes, first took to the sea about 49 million years ago and became fully aquatic 5-10 mil years later. What describes an archaeocete is the presence of anatomical features distinctive to cetaceans, alongside different primitive features not seen in modern cetaceans, such as noticeable legs or asymmetrical tooth.|21||22||23||9| Their features became adapted for living in the marine environment. Major anatomical changes included their hearing set-up that channeled vibration from the jaw to the earbone (Ambulocetus 49 mya), a streamlined body and the regarding flukes on the tail (Protocetus 43 mya), the immigration of the nostrils toward the...
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