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Your brain is likely reverse-engineering a reason

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AD757 TIL the Pot-in-pot refrigerator uses a porous outer clay pot (lined with wet sand) containing an inner pot within which food is placed. The evaporation of the outer liquid draws heat from the inner pot, and requires only a flow of relatively dry air and a source of water, but no electricity.
9YJGQ TIL despite the Romans using lead water pipes, lead poisoning from the water supply system was almost nonexistent since the high calcium content in their water created a layer of plaque preventing the water contacting the lead itself.
EgEa7 TIL how one of just two XB-70 supersonic bomber prototypes was lost during a 1966 photo-op for GE
0wkWR TIL of Kevin Carter. A member of the Bang-Bang Club, photographers who chronicled apartheid-­era South Africa. He took the “starving child and vulture” pic. He won the Pulitzer for the pic and soon after took his life, writing, “I am haunted by the vivid memories of killings, corpses, anger & pain.”
nemLB TIL that the modern day American flag concept was created by a 17 year old for a school project. He received a B- and was told if congress accepted the flag, his grade would be reconsidered. When congress accepted the flag’s concept, the teacher then changed his grade to an A.