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TIL that NFL QB Drew Bledsoe sheared a blood vessel from a hit. He most likely would have died but a team doctor caught it before he went home. The case is now taught to med students as a reason to not “jump to conclusions”. Bledsoe was replaced by a young QB named Tom Brady, his first game.

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ADKEl TIL if you run out of bandages, know that you could—but probably wouldn't want to—reach for the cobwebs in your basement as an alternative. Cobwebs actually have natural antiseptic and anti-fungal properties, and were used in ancient Greece and Rome by physicians to make bandages.
X0omR TIL Hippocrates believed that hair was hollow and its purpose was storing semen, which was created in the brain. As men went through puberty the semen would flow into the hair all over their bodies. Women lacked body hair but had long head hair to more readily absorb semen during intercourse.
rgjo TIL when Richard III’s remains were discovered, while the maternal DNA was matched to a known descendant of his sister, his paternal DNA did not match his (supposed) modern relatives.
m1rvP TIL: before 1993, there were only two colors of visible light LEDs. The invention of the blue LED changed everything.
BgM8W TIL about Kessler Syndrome, which describes the exponential growth of space debris, as collisions between space junk create smaller and difficult-to-track pieces of debris that contaminate our orbital real estate.