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TIL the bluest blue (to date) was accidentally discovered when a researcher received a grant to explore novel materials for electronics applications and tried to heat together oxides of manganese, yttrium, and indium at two thousand degrees Fahrenheit

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xvbD TIL that during construction of the Panama Canal, Ancon Hospital, one of the best hospitals in the tropics, kept potted plants in its open-air atrium in bowls of standing water to keep away ants, not realizing that the mosquitoes that bred in such water were the carriers of malaria and yellow fever.
eMag TIL That Batwoman was introduced in 1956 in order to quell suspicions that Batman was homosexual.
8aoLL TIL of the Lodz Ghetto, where at one point 20000 'useless eaters', mainly children under 10, were rounded up and taken away from their families to be exterminated. Many parents committed suicide.
XE8NE TIL Sean Bean was so afraid of flying during the filming of LOTR that he would hike a few miles up the mountain to get to the set’s location, sometimes in full costume and gear.
X0D7P TIL of the Spartathlon, a 246 kilometer race between Athens and modern-day Sparta. It is based on the run of Pheidippides, who in 490 BC ran from Athens to Sparta before the Battle of Marathon in a day and a half to seek aid against the Persians.