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Analysis of 47.5-milion-year-old fossils from Pakistan has yielded fresh insights into the early ancestors of modern whales. For example, Maiacetus inuus was a land animal (i) life in the sea. One Maiacetus innus fossil encased a fetus positioned for a head-first delivery, which is typical of a land mammal and suggests the species gave birth onshore. But it probably spent much of its time (ii) : its big teeth were suited for catching fish, while its flipper-like feet must have been (iii) walking.
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