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TIL In 1903, a barge tipped somewhere off the coast of Staten Island, sending most of its 7,700 silver-and-lead bars to the bottom. Most bars were recovered right away, but some 1,400 bars, valued at up to $20 million today were never found.

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Y76LA TIL: Self replicating probes or spacecraft, also called Von Neumann probes was a concept theorized by the mathematician. He argued that this is the most efficient method of space exploration/mining as they can adapt. The concept has been used in various media such as Mass Effect, Star Trek, etc.
l7eMa TIL that after William Shepherd became an astronaut, a rumor spread that during a NASA interview, the Navy SEAL answered a question on what he did best by saying "kill people with knives". Shepherd refused to confirm or deny, saying that "it's too good a story".
yQdkV TIL that both humans and domestic dogs elicit a dramatic increase of oxytocin, the bonding hormone, from the other when staring into each other's eyes. Similar to a human mother and her infant.
W7g4X TIL that there's a sport called Motoball, which is essentially soccer played on motorcycles. Each team comprises 5 players on motorbikes and one player on foot, who serves as the goalkeeper. The ball used is slightly larger to accommodate the unique nature of the game.
nAnb TIL On June 28, 2009, Stephen Hawking held a party open to all, complete with hors d'oeuvres and iced champagne, but only publicized the party after it was over so that only time-travellers would know to attend; as expected, nobody showed up to the party.