Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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In 2011, a male tiger in India adopted a litter of orphaned cubs, taking on the role of ‘mother’. Wildlife officials say such behavior had never been observed before.
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A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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