Dolphins have names for one another.
18
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
292
Honeypot ants are a unique insect that use their own bodies as living storage pots of honey.
4
The lungfish can live out of water for three years in a state of suspended animation.
48
The lifespan of mammals is about 1 and a half billion heartbeats.
127
A group of frogs is called an army.
51
A blue whale's heart is the size of a Volkswagen Beetle!
37
Dogs have four toes on their hind feet, and five on their front feet.
179