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TIL- the wheel was invented after metal alloys, canals and sailboats.

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XEM58 TIL that in 1935 the U.S. 23rd Bomb Squadron dropped twenty 600-pound bombs in the path of a volcano’s lava flow, thus saving the city of Hilo, Hawaii by diverting the lava away from the city.
4X60w TIL: Norway has a global seed vault that was constructed in an abandoned Arctic coal mine to store and safeguard the world’s crops and plants from global natural or man-made disaster.
4leg TIL Victoria cross recipient Charles Smith Rutherford, single-handedly took 45 German soldiers prisoner. After calmly drawing his revolver he managed to convince the enemy that they were surrounded.
0dkyM TIL that Mt. Washington in New Hampshire is considered the place with the "worst weather on planet earth" rivaling the Himalayas and polar regions.
BrxBD TIL the first ever photocopier, the Xerox 914, caught fire so frequently that a “scorch eliminator”, asmall fire extinguisher, was provided with the copier.