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TIL about Areca Nut (Betel Nut) - a widely consumed psychoactive substance in Southeast Asia and parts of the Pacific, with severe health risks affecting millions of people worldwide, and ongoing efforts to combat its addictive properties.

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J17pm TIL a study from 2015 showed evidence that polar bears are submissive to grizzly bears even when the latter is smaller, fewer, and/or not acting aggressively. Polar bears acted submissively towards grizzlies in 132/137 interspecific interactions at whale carcasses.
N74ye TIL that Carl C. Brigham, a eugenist, used an intelligence test to determine the intellect of recruits for WW1. He concluded that the mixing of races is what was leading to the downfall of American education. He later adapted the test for higher education and it is now known as the SAT.
kOkKW TIL that Berthold Schenk Graf von Stauffenberg, eldest brother of Claus, one of the primary architects of the July 20 plot to assassinate Hitler, was also executed for his own participation. He was strangled and revived multiple times, and the whole process was filmed for Hitler to view later.
Z8Y6a TIL that in Alabama tomorrow is Jefferson Davis Day which is still a state holiday. Instead of Martin Luther King Jr. Day they have Robert E Lee's Birthday, and April 22nd was Confederate Memorial Day.
R16 TIL Sperm has anti aging effects.