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TIL that the Earths first mass extinction event was caused by the newly formed Oxygen molecule. Known as the Oxygen Holocaust, the event caused the mass extinction of cellular life all over the planet some 2.4 Billion years ago.

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LD4Z TIL In 2009, The Sun attacked Gordon Brown for misspelling the name of a soldier killed in Afghanistan, but in doing so misspelled the name themselves
yQZRa TIL that the population of Ireland is still about 2 million less than what it was before the Potato Famine.
xLAk TIL: Due to Chimerism, a DNA test showed a mother was not the mother of her own children.
09Kv TIL There is enough water in Lake Superior to cover the entire land mass of North and South America with roughly one foot of water
RQ7j TIL WW2 bombing accuracy was so abominable, there was only 22% chance of a bomber crew finding its way to within 5 miles of its target and for heavily defended targets the percentage dropped to 7%.