Dogs have been man's pet for over 14,000 years.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The largest earthworm on record was found in South Africa and measured 22 feet.
151
Dire wolves actually existed, living up to 10,000 years ago before going extinct.
10
Using a remote-controlled camera, biologists caught dolphins getting high by sucking on puffer fish. They were even caught passing the puffer fish around.
23
It has been scientifically proven that stroking a cat can lower one's blood pressure!
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