One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
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
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
There are approximately three chickens for every human on Earth.
13
Denmark has twice as many pigs as there are people.
66
Sheep, goats, octopuses, and toads have rectangular pupils.
7
Cats recognise the voice of their owner, but never evolved to care.
22