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TIL milk becomes sour and curdled when it warms because a harmless bacteria called lactobacillus is activated which converts lactose to lactic acid. The acid converts a protein called casein to a curd. It’s the reason we can enjoy other milk products like cheese.

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wLZVJ TIL Paw Paw French is a dialect of French that was widely spoken in Missouri for hundreds of years. Today there are only a few dozen native speakers left.
GYvyg TIL that daydreaming isn't just zoning out without thinking about anything but literally dreaming while being awake and that I never had a daydream
ZplAY TIL the average penis size has increased by 24% over the past 29 years
xVJeo TIL Young children develop "theory of mind" earlier if they know two languages, and in older people, bilingualism can postpone the onset of dementia. Researchers say the statement that learning languages makes people smarter has a sound scientific basis.
9aa7 TIL of the Carolina Parakeet, a neotropical parrot that was native to much of the United States up until they were driven extinct by deforestation, hunting, and possibly disease in 1910. They lived in huge flocks of up to 300 birds and were likely poisonous to eat.