One reason that kittens sleep so much is because a growth hormone is released only during sleep.
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Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
A 42-foot sperm whale has about 7 tons of oil in it.
209
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Moths are unable to fly during an earthquake.
328
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Sharks, like other fish, have their reproductive organs in their chests.
248