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
The Chow and the Chinese Shar-Pei are the only dogs that have black tongues.
32
A hedgehog's heart beats 300 times a minute on average!
14
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
Penguins can convert salt water into fresh water.
97
The average life span of a hermit crab is 75 years!
45
Penguins have a gland above their eye that turns saltwater into freshwater.
12
The cat brain weighs about 30g.
167