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TIL of a device called the Salmon Cannon that uses a pressure differential to suck up a fish, send it through a tube at up to 22 mph, and then shoot it out the other side. This allows the fish to bypass dams and get upstream to spawn.

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MeKB0 TIL That a small portion of television static you see between channels is caused by cosmic background radiation, remnants of the 'Big Bang'.
nWOW TIL that on November 6, the people of Puerto Rico will vote on whether to become the 51st state
kJ571 TIL That a 1.1 grade in Germany is equivalent to 9.8/10 in Indian Scale
69NEX TIL newborn babies shouldn’t drink plain water because it can lead to brain swelling and even death.
L779 TIL of Manichaeism. It spanned from the Roman Empire to China. Founded by Mani, who claimed to be a successor of Buddha, Zoroaster, and Jesus. St. Augustine was a Manichee before he apostatised. Today none of its texts has survived and it is now extinct due to a worldwide holocaust of its adherents.