Dogs have been man's pet for over 14,000 years.
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The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
8
Sloths take two weeks to digest their food.
243
Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
17
When cats are happy, they may squeeze their eyes shut.
10
In 1949, an official boxing match between a bear and a man was held. The bear won.
41