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TIL there is a large underground tunnel system connecting over twenty buildings in Houston. In the tunnels there is everything from food courts to dry cleaners.

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krKg TIL An 18-year-old man tried to eat his underwear in the hope that the cotton fabric would absorb alcohol before he took a breathalyzer test.
Mbwm TIL that Sybil Ludington, a 16 year old girl, rode more than twice the distance of Paul Revere in order to warn Americans of an imminent British attack.
xVAx7 TIL that the ratio between your index and ring finger is indicative of prenatal testosterone/estrogen exposure and is also correlated with various traits related to health, behavior, and even sexuality later in life.
6Eky7 TIL nearly every claim by Frank W. Abagnale Jr. in "Catch Me if you Can" has been debunked.
J1l6l TIL that the 400m world record holder Wayde Van Niekerk is the one and only sprinter in history to have run sub-10, sub-20, sub-31 and sub-44 at 100m, 200m, 300m and 400m respectively.