Dogs have two sets of teeth, just like humans. They first have 30 "puppy" teeth, then 42 adult teeth.

The South American degu, a small rodent, uses urine to mark its passageways. Its urine reflects ultraviolet light, which the degu can see.

The most senior crayon maker Emerson Moser retired after making 1.4 billion crayons for Crayola. It was then that he revealed that he was actually colorblind.

AMAZING FACTS