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TIL four out of every five animals on Earth is a nematode

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eVE6 TIL there was a man named Joseph Bolitho Johns who escaped Australian prison so many times, they built a special cell just for him. He escaped that as well.
7r9gX TIL Hydrogen-alpha filters used for looking at the sun transmit only one specific wavelength of light: a deep red light emitted by hydrogen atoms of the sun. H-alpha filters are much more expensive than white light filters. The least expensive ones start at about $700
5Yl5r TIL we can't make up for a sleep deficit by sleeping longer another day
kOw7E TIL there's a Japanese photographer spending his life shooting women’s thighs
9P8X TIL the Jay Treaty of 1794 between the U.S. and England so angered the French that they did not invite the U.S. to the Convention du Mètre, which is cited as a major reason why the US is not on the metric system.