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TIL that there is a enormous amount of water underneath the sand in the Sahara Desert. Estimated to be 18,000 cubic kilometers.

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j69vM TIL Moon Trees: There are trees growing on Earth today that were grown from seeds that orbited the moon aboard the Apollo 14 mission in 1971. These “moon trees” are found in parks across the U.S.
ORY1 TIL that from 1902-1907, a group of 12 scientists regularly ate dangerous, common food additives that had previously been untested, such as formaldehyde, and documented how they reacted to said additives. They were known as “The Poison Squad,” and helped spur the creation of the FDA.
b5YE TIL Alexander the Great once organized an Olympic Games to honor a dead religious leader. However, since the Indians weren’t familiar with Greek sport, he opted for a wine-drinking contest instead. 41 contestants died and the winner lived for just four days after his victory.
vEPr TIL There is a trade agreement being secretly proposed in countries such as America and Australia, which would allow corporations to sue the government if they attempted to, in any way, lower their potential income, such as providing cheap alternatives to branded medicines.
9YkoG TIL that praising a child’s intelligence may encourage them to only engage in low-risk tasks in which their intelligence won’t be challenged, as learning takes a backseat to praise-seeking. This can last throughout adulthood. For better results, praise them on their efforts instead.