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TIL Water has a density anomaly: Up to 4°C, its density actually increases. Warmer water is denser which makes it go down. That's why ice forms at the top of lakes, which insulates the rest of the water body, thereby protecting the aquatic life during harsh winters.

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W7EYo TIL: To this very day there is a 'cargo cult' on Tanna island in the Republic of Vanuatu that believes that an American named John Frum will return one day and reward the faithful with prosperity and riches.
wp17 TIL New York tried to outlaw leaded gasoline back in the early 1920’s - before it was commonplace. However, the Federal Government sided with Big Oil, overruling the state’s decision.
neWM7 TIL of Regulatory Capture, when a governmental regulatory agency ceases to promote the interest of the public, but instead does the exact opposite by advancing the commercial or political concerns of special interest groups that dominate the industry or sector it is charged with regulating.
a8nNZ TIL that the opening and ending theme songs to "Mr Rogers Neighborhood" are never played exactly the same in any of its 900+ episodes. Each episode used the same medley for the first 8 bars, and the rest was improvised and recorded, live, by jazz piano virtuoso John Costa.
b64g7 TIL that remote work can save both the company and the employee thousands of dollars per year. Companies can save up to $10,600 per remote employee, while employees can save up to $12,000 by working remotely.