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TIL: Rhododendrons and Azaleas are toxic to both pets and humans, including honey made from both plants.

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7rKaZ TIL High School boys had to swim in the nude in schools across America until 1970
yQArX TIL: what it means to measure immortality (sometimes called "lifespan") of an electron, in experiment that failed to disprove immortality assumption, but has offered its minimum lifespan at 66,000 yottayears, which is more than five-quintillion times the current age of the Universe
XE87k TIL Approximately 0.5 - 1 tons of Titanic's wreck is turning to rust every day. It is expected to collapse entirely within 50 years.
b98KE TIL Every 4th of July The Philadelphia Liberty Bell is tapped (not rung) 13 times to honor the 13 colonies
OoOvg TIL only 40% of all men who have EVER lived have contributed to the worlds current gene pool. Which means 60% of men died childless. 80% of all women who have EVER lived contributed to the gene pool.