There are approximately three chickens for every human on Earth.
13
The cat brain weighs about 30g.
167
Bats sleep 18-20 hours per day.
5
Dolphins have names for one another.
18
Only 3% of bird species have penises.
0
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2