Spiked and studded dog-collars derive from the days of the Ancient Greeks, who would give their sheep-dogs sharply spiked collars to protect their necks from wolves whilst they watched over a Sheppard's flock at night.

The human heart can create enough pressure that it could squirt blood at a distance of thirty feet.

The Nike swoosh was designed by a Portland State University student, and purchased by Nike for $35.

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