Dogs have been man's pet for over 14,000 years.
224
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Ants have tiny magnetic compasses in their antennae which help them navigate.
9
One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Denmark has twice as many pigs as there are people.
66
Only 3% of bird species have penises.
0