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TIL the unique strontium isotope composition of the bedrock where you grew up is recorded in your tooth enamel. This allows archaeologists to analyze a person’s remains and determine where in the world they lived as a child.

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LQdQP TIL that one person is a doctor, lawyer, dentist, and scientist. Scott Orr has DDS, PhD, JD, and MD degrees. He is a professor of anesthesiology, law, plastic surgery, and sports medicine in Las Vegas.
0d8QL TIL there is a (tongue-in-cheek) secret society called The Sons of Lee Marvin. It consists of people who bear a resemblance to the actor, so that they could plausibly be his sons. Actual or rumored members include Jim Jarmush (founder), Tom Waits, John Lurie, Iggy Pop, Neil Young & Josh Brolin.
oGyK TIL there was a pilot made for a MAS*H spin off, where Radar moved from Iowa to St. Louis and became a cop
QJ5bX TIL that the working title for "Bill & Ted's Bogus Journey" was "Bill & Ted go to Hell".
8MNX TIL that a 55 gal steel drum can be crushed like a tin can by heating it and then cooling it with ice water