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.
9
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
Dogs sometimes fake being sick to get attention.
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The reindeer is the only mammal that can see UV light.
17
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7
Domestic pigs average a top speed of about 11 miles per hour.
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