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TIL that 20th President James A. Garfield was ambidextrous and was versed in both Greek and Latin. He would sometimes entertain his friends by having them ask him questions and then writing the answers simultaneously in Latin in Greek using both hands.

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BwYD TIL according to an analysis by the Guttmacher Institute, unplanned pregnancies cost US taxpayers $2.1B each year, more than half of U.S. pregnancies are unintended, and roughly 1-in-20 American women of reproductive age have an unplanned pregnancy each year.
wLQWM TIL that Ruby-throated Hummingbirds are able to fly across the Golf of Mexico, a distance of 500 miles, in one 20-hour non-stop flight. This requires more calories than the bird's weight, so they prepare by doubling their fat mass. They expend the entire caloric reserve during the flight.
WkMnL TIL: the first pilots crossing the Atlantic, crash landed on bogland in the western tip of Ireland. During their flight they came into free fall twice above the ocean. They lost the hood of the ‘cockpit’ and went trough snow and rain at 3500 m altitude, soaking and freezing them completely.
JY5e4 TIL that scientists had to rename as many as 27 human genes because Microsoft Excel kept misreading their symbols as dates
KXgR TIL Heath Ledger turned down the role of Bruce Wayne/Batman in Batman Begins saying that he “would never take a part in a superhero film.”