Cats recognise the voice of their owner, but never evolved to care.
22
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
The oldest recorded elephant lived for 82 years.
213
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 cats are happy, they may squeeze their eyes shut.
10
Condoms were originally made of animal intestines or linen.
347