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
Condoms were originally made of animal intestines or linen.
347
The elephant brain weighs about 6,000g.
274
It's possible to train your cat to use the toilet as a litter box and even flush afterwards.
109