A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Travis was a chimpanzee who socialized with humans since birth. He could log onto a computer to look at pictures, watch TV using a remote control, brush his teeth, feed hay to his owner's horses, water plants, and learned the schedule of passing ice cream trucks.
11
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
The elephant brain weighs about 6,000g.
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