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TIL A doctor saved life by sucking urine from a man's bladder mid-flight to NYC

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X04Pk TIL that the world is running out of sand. Sand is the most-consumed natural resource besides water, and it's the main ingredient in concrete, glass, and silicon chips. Most harvested sand goes to make concrete, but desert sand isn't suitable for concrete because it's too smooth.
GYakG TIL Without Quantum mechanics, we couldn't understand why the Sun shines. Quantum tunnelling allows the atoms to spontaneously overcome the electromagnetic repulsion between positively charged protons and produce the nuclear fusion, something the heat and pressure at the Sun core can't do at his own
R7ZEl TIL About a book called “The Secret (treasure hunt)”. It contains 12 cryptic paintings associated with 12 cryptic riddles you must decipher in order to dig up a key to the loot buried around the U.S. and Canada. Only 3 have been discovered since 1982.
YJ7d TIL that in 2008, Harvard created their own version of the classic Food Pyramid that more accurately reflected dietary science.
a8BAN TIL Blue whales have the largest penises on Earth. An erect blue whale penis is 12 inches (30 cm) in diameter and ten feet in length.