African heart-nosed bats can have such a keen sense of sound that they can hear the footsteps of a beetle walking on sand from six feet away.

When Black Jack Ketchum was hung back in 1901 in Clayton New Mexico, the noose actually ended up taking his head off. The head had to be sewn back on so Black Jack could be buried properly.

There are 118 ridges on the edge of a United States dime.

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