You shed about 1.5 pounds of skin every year, contributing to household dust. Over 700 species of bacteria live in your mouth, playing a vital role in oral health and digestion. Your body emits a ...

An curved arrow pointing right. These facts may astound you, but they are in fact real. Learn a little something about history, science and even some grammar. Produced by Justin Gmoser.

To understand the true might of the United States Air Force, you have to know they track Santa Claus every Christmas Eve, which is a herculean task. Taking place at NORAD (North American Aerospace ...