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TIL that dolphins go on killing sprees when they’re sexually frustrated

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yV8nl TIL that aqueducts are water channels that use gravity to move water from a source to a destination. An ancient Roman aqueduct used only a 51 foot height difference to push water down a 31-mile-long path, resulting in as little as a 1-inch drop to push water 1,500 feet.
9Ywmr TIL of the huia bird. It went extinct in 1907 and its call was never recorded, but it exists today because an elderly Maori man imitated in 1949 from memories of his childhood.
b94rj TIL there's a Burger King Kingdom, which is Burger King's fantasy world answer to McDonaldsLand
neB1b TIL Mango sap is caustic
gKgD TIL crows recognize individual human faces and hold grudges.