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TIL Norway has underwater drones which fire lasers in order to kill lice on salmon

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via ift.tt

P1ZyL TIL that tin cans were invented over 75 years before the can opener. Early cans weighed more than the food they contained, and needed to be opened with a hammer and chisel.
nWK5W TIL a woman claimed three of her toes, which had been amputated 8 years before, miraculously grew back, prompting a man to create ShowMeTheToes.com to demand proof.
9Yrvr TIL the proper age order for US draftees goes 20, 21, 22, 23, 24, 25, 19, 18.
R55w6 TIL how trains turn, without a differential. The wheels should create massive friction under the heavy loads. It is solved by conical wheels.
9wKQ TIL The Dalai Lama eats meat every other day, and once said “I’m a Tibetan monk, not a vegetarian.