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TIL The US Government presumes a business to be “socially and economically disadvantaged” if it’s owner is Black, Hispanic, Native American, Asian, or a Woman.

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E1GAd TIL that the concrete used by the Roman Empire has been proposed as an alternative to modern concrete. It's believed that it would have a substantially smaller environmental impact than our own in addition to being far more durable, surviving thousands of years in harsh conditions nearly unscathed.
l7YyB TIL people in London used to celebrate "Frost Fairs" on the river Thames when it froze over allowing pubs, market stalls and events to be set up on the ice (Once there was even a parade of Elephants!).
ANKKd TIL: The area of Lake Chad experienced four heydays between 39,000 BC and 300 BC. This has been called Mega-Chad.
Ypw8B TIL during the Chernobyl meltdown, it was feared that molten fuel (corium) would reach flooded areas and explode. Three engineers tried to prevent this, but corium dopped into the water before they arrived. The fuel then cooled into a ceramic pumice and floated around the room, instead of exploding.
JYoX4 TIL the opening to Dire Straits' "Money for Nothing", which has guest artist Sting recite "I want my MTV", led to it being the first song to play on MTV Europe when it first aired.