The world's smallest winged insect is the Tanzanian parasitic wasp. It's smaller than the eye of a housefly.

The planet Venus spins opposite to the other planets in the solar system.

Nobody knows who built the Taj Mahal. The names of the architects, masons, and designers that have come down to us have all proved to be latter-day inventions, and there is no evidence to indicate who the real creators were.

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