Rattlesnake mating sessions have been known to last more than 22 hours.
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When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
A 42-foot sperm whale has about 7 tons of oil in it.
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Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
A puppy is born blind, deaf, and toothless.
16
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
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
Mahatma Gandhi used to travel with his goat so that he could have fresh milk.
11