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TIL large schools of fish can accidentally trap themselves in a small area with no way out while attempting to evade predators. If there are too many in a small or enclosed area they can deplete the water of oxygen and they will asphyxiate by the thousands.

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e0mZL TIL about "Gray Gardens" a 1975 documentary about the eccentric lifestyles of Edith Ewing Bouvier Beale and Edith Bouvier Beale, known as "Big Edie" and "Little Edie" respectively, a mother and daughter who removed themselves from society, and live in decaying, old mansion.
KOrEw TIL The World Mosquito Project scientists cultivate and release mosquitoes infected with a bacterium called Wolbachia. The bacterium is passed down to future generations. The bacterium appears to block mosquitos from transmitting arboviruses (dengue, chikungunya & yellow fever) & Zika
1adMD TIL The Simpsons episode "Bart Sells His Soul" would originally feature "Jesus He Knows Me" by Genesis, but since they could not obtain the rights to use it "In-A-Gadda-Da-Vida" by Iron Butterfly was used instead.
a8YNZ TIL humans can have a form of echolocation.Just by clicking their tongue or simply snapping their fingers they can know where they are, or where to go.About 30 percent of blind people use this with their stick that most use. Even people who aren't blind can do this with lots of patience and training
OoOae TIL that a USSR physicist published his equations for solving reflected electromagnetic waves from surfaces, as the Soviet authorities considered them insignificant for military purposes. His work was found by Lockheed in the 1970s, leading to a breakthrough in developing their stealth plane F-117.