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TIL Psychologists are interested in magicians because they've been doing experiments for centuries and built a lot of techniques. Tricks rely on manipulating expectations, misdirecting, and can influence decision-making – all things that intrigue psychologists.

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oR94W TIL Hollywood actress Hedy Lamarr did NOT help invent Wi-Fi, Bluetooth or cellphones...
11j8 TIL Petrichor is the word for the earthy scent produced when rain falls on dry soil.
neV7 TIL on September 6, 1949, a mentally disturbed WWII vet killed 13 of his neighbors and injured 3 more in what is considered the first single-episode mass murder in US history. When he died in 2009, his last words were “I’d have killed a thousand if I had enough bullets.”
1N98 TIL that in 1881 an ice floe forced the Sharp’s Island Lighthouse off its foundations, after which it floated nearly five miles down the Chesapeake—with its keepers still inside—until it ran aground, allowing the men to escape unharmed.
J1QpV TIL of the Great Green Wall of the Sahara and the Sahel, a plan to plant continent-wide wall of trees stretching from Djibouti, Djibouti to Dakar, Senegal. The goal is to combat desertification in the Sahel region and hold back the Sahara desert.