Sheep can recognize other sheep from pictures!
71
An ant brain has about 250 000 brain cells. A human brain has 10,000 million so a colony of 40,000 ants has collectively the same size brain as a human.
118
Hummingbirds can't walk.
32
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
A baby eel is called an elver, a baby oyster is called a spat.
18
A rat can fall from a five story building without injury.
44
Jellyfish as a species are actually older than dinosaurs and sharks.
383