Kangaroos Use Tail as Fifth Leg, Say Researchers - Presented by: The Aol. On Network

According to scientists, the kangaroo uses its tail as a fifth leg. While best known for hopping, the marsupial spends most of its time walking as it grazes for food In tests conducted inside this force-measuring Plexiglas box, the researchers, from Canada, Australia and the US found that the marsupial's tail gives as much forward force as its front and hind legs combined. In fact, sensors showed its tail, supported by more than 20 vertebrae, did as much mechanical work as a human leg,



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