When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109
The elephant brain weighs about 6,000g.
274
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
Cows as they are today never existed in the wild and were domesticated from aurochs some 10,500 years ago.
6