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TIL that the Gulf of Mexico has a dead zone: an area of hypoxic (less than 2 ppm dissolved oxygen) waters, which supports fewer organisms and has been linked to massive fish kills and can cover up to 6,000-7,000 square miles (9656-11265 square kilometers) at the mouth of the Mississippi River

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4kmxb TIL James Madison was the smallest U.S. president. He stood 5'4" and weighed just over 100 pounds.
8arK4 TIL a Canadian study found that Agatha Christie's later-written novels had a 30% reduction in vocabulary and other possible signs of Alzheimer's Disease.
dDA08 TIL Australia has an unofficial timezone (UTC +08:45), which is observed by only 5 country towns (total combined population ≈200 people) along the Nullarbor Highway, near the border between South Australia and Western Australia.
xlYo TIL Paul Boyd, animator on Ed Edd and Eddy was shot in the head by the police while on his hands and knees.
m1Dy TIL Happy Hour is illegal in Massachusetts.