Only 3% of bird species have penises.
0
Alligator snapping turtles can live for over 150 years. Scientists know this because some of the turtles had musket balls in their stomachs.
271
Condoms were originally made of animal intestines or linen.
347
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The difference between antlers and horns is that antlers are shed each year and are made of bone while horns are kept for life and are made of living tissue and bone with a sheath that is very similar to human finger nails.
10