The Eiffel Tower was the tallest structure in the world before the construction of the Empire State Building in 1930.

Braces were first invented by Pierre Fauchard in 1728. The braces were made by a flat strip of metal, which was connected to the teeth by thread.

The platypus uses its bill to find animals that it feeds on. Its bill can sense the tiny electric fields that their preys emit.

AMAZING FACTS