Only 3% of bird species have penises.
0
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
The elephant brain weighs about 6,000g.
274
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
There is a sea snail that wears a suit of iron plated armor. It is the only known animal to use iron sulphide as skeletal material.
9
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79