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TIL on Jan 23, 1960, about 9 years before the moon landing, Jacques Picard and John Welsch reached the deepest point in the ocean, known as The Challenger Deep. They descended into the Mariana Trench for 4 hours and 47 minutes in a submarine barely large enough to fit the two men.

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M751a TIL that in 1953, Isaac Asimov wrote a story where he predicted that climbing Mount Everest was impossible and that the first human to reach its summit would have to be parachuted. Everest was first successfully climbed one month after he wrote it and 7 months before it was published.
nWaab TIL that the Titanic was the place of discovery for tiny iron eating microbes. These microbes form icicle-shaped “rusticles.” Which consists of 35% iron compounds and a community of symbiontic microbes and fungi. “Halomonas titanicae” is expected to dissolve the Titanic by 2045.
ADGkl TIL Honduran white bats (Ectophylla alba) or Caribbean white tent-making bats, create their own daytime sleeping quarters by using their teeth to cut the ribs of large leaves causing them to fold down to form a tent. They appear as white puffballs when they gather in groups.The bats mostly eat figs.
Wm9o TIL the Union Jack is not symmetrical, to guarantee you can’t hang it upside down
nQKd TIL of a monk who had taken an old book written by Archimedes, erased the contents, and wrote over it with prayers. Scientists have determined that that monk erased a previously unknown book by Archimedes, that laid out the foundations of Calculus thousands of years before Newton and Leibniz.