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
Turkeys can reproduce without having sex.
122
Sharks have been on the planet longer than trees.
14
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16
Dogs can make about 100 different facial expressions.
18
A group of pugs is called a grumble.
10
By feeding hens certain dyes they can be made to lay eggs with multi-colored yolks.
40