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A U.S. dollar bill can be folded approximately 4,000 times in the same place before it will tear.
Tear gas is banned for use in international warfare, but is still legal to use in the U.S.
Cheetahs have “tear marks” that run from the inside corners of their eyes down to the outside edges of their mouth. These marks help reflect the glare of the sun when they are hunting during the day. They work just like the black marks that football players put under their eyes during the games. These marks also work like the sights on a rifle, to help the cheetah “aim” and stay focused on their prey when they are hunting.