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TIL That there is a volcano in Ethiopia that spits blue lava

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xAA7 TIL that mathematician Paul Erdős published so many papers during his lifetime that there exists the Erdős number scale which measures the “collaborative distance” between Erdős and other mathematicians. Over 130,000 mathematicians have an Erdős number.
QJpEE TIL when the original director of mega-flop The Island of Dr. Moreau (1996) was fired and replaced, he secretly returned to set disguised as a mutant dog and worked for the rest of production as an extra.
Z81BR TIL polar bears have a black skin with a transparent fur to absorb the sun's heat. They appear white because the air spaces of each hair scatters the light in all directions.
gkdb TIL in Aug 1914 the Frank Lloyd Wright’s estate in WI was set on fire by a male servant. The servant then killed Wright’s mistress Mamah Cheney, her 2 children and 4 estate workers with an axe. Afterwards he drank muriatic acid but was caught and died in jail 7 weeks later from self starvation.
aKbJ TIL an Australian infant vanished in 1980 and her mother served prison time for the murder, and 32 years later it was declared she had actually been taken by a dingo.