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
Frogs sometimes eat enough fireflies that they themselves glow.
71
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
A killer whale's heart beats 30 times a minute under water, 60 times a minute on the surface.
30
The ancestor of all domestic cats is the African Wild Cat which still exists today.
12
Only female bees work.
20
In just about every species of mammal, the female lives longer than the male.
43
