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TIL, in 1915 William Wrigley invented direct marketing by mailing complimentary sticks of Doublemint gum to every household (1.5million) listed in every phone book in the states. He repeated that in 1919 mailing gum to 7 million households.

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D1j9v TIL "Green Light Therapy" has shown the ability to improve migraines. Red & Blue light were both found to stimulate nerve activity which increased migraine risk. A narrow band of green light was found to cause the least stimulation which resulted in easing of symptoms and fewer migraines.
v1wEr TIL that just after shooting “The Goonies,” Richard Donner desperately needed a break and flew to his Hawaii home to get away. In response, Spielberg flew the cast to Hawaii, and Donner eventually came home to discover the child actors had emptied their luggage and were lounging on his furniture
1Aj4 TIL the phrase “lo and behold” is just short for “Look and behold”
4XwwX TIL that the 3 times that the 25th Amendment of the US Constitution has been invoked for an acting President, all have been concerned with colonoscopies.
DQ71D TIL Angelica Huston played the antagonist "Supreme Leader" in Michael Jackson's "Captain EO" at Disneyland.