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TIL that more than three billion people rely on the ocean to make a living

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16p7 TIL there is a subgenre of rap called ‘Chap Hop’ that is essentially gentlemenly rapping
LRom TIL Years before Kelly Johnson designed the SR-71 Blackbird, he designed an even faster drone called the X-7. It flew over 130 flights and exceeded Mach 4.3, and was developed into the AQM-60 drone. Both were made of Steel.
ADrOa TIL Herma are ancient greek statues featuring only a head, typically Hermes, and a phallus. In 415 BC all of the Athenian Herma were vandalized by having the penises removed.
8alP4 TIL the Ozma problem is an old problem asks if we could communicate the concept of left and right to an alien over the radio. In the 1950's physicists found a way when they observed that certain radioactive decays actually "care" about if the atom is spinning clockwise or anti-clockwise.
VM74m TIL that the earth accumulates ~40,000 tonnes of space dust every year.