In 1968, Abbie Hoffman played with a yo-yo while testifying before a congressional committee. He was found in contempt.

Some dogs can predict when a child will have an epileptic seizure, and even protect the child from injury. They're not trained to do this, they simply learn to respond after observing at least one attack.

Two very popular and common objects have the same function, but one has thousands of moving parts, while the other has absolutely no moving parts - an hourglass and a sundial.

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