When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
The cat brain weighs about 30g.
167
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
When the "Elephant Whisperer" Lawrence Anthony died, a whole herd of elephants arrived at his house to mourn him.
25
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212