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Pakicetus, A Four-Legged Furry Carnivore That Was a Prehistoric Ancestor to Whales and Dolphins
PBS Nova explained how a small, furry prehistoric four-legged, semi-aquatic carnivore ... It has a sloping surface on this ...
Natural History Museum%2c London1y
When whales walked on four legs
Follow their extraordinary journey from shore to sea. Although whales are expert swimmers and perfectly adapted to life underwater, these marine mammals once walked on four legs. Their land-dwelling ...
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Scientists accidentally make mouse grow legs instead of genitals
Scientists were aware that, in most four-legged mammals, the genitalia and the hind limbs develop from the same early structures. To their surprise, they found that an embryo developed extra limbs ...