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TIL On January 13, 1920, a New York Times editorial said rockets could never work in space because in a vacuum there was nothing for them to push against. The paper later said it regretted the error.

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0EBL TIL that employees and customers of the popular grocery chain Market Basket successfully boycotted the company after its beloved CEO was fired. During the monumental protests, Market Basket lost an estimated 10$ Million per day.
7r5VO TIL J Robert Oppenheimer, inventor of the A-bomb, resigned as leader of Los Alamos. The program had shifted focus to thermonuclear weapons, and Oppenheimer vehemently opposed the hydrogen bomb and similar weapons on the grounds that they were more destructive than mankind could responsibly control.
Br6db TIL the U2 Spy Plane, first launched in 1955 and instrumental during the Cuban Missile Crisis, is not only still in service for surveillance missions, but still also uses film for its high-resolution photography.
KPNG TIL a US Marines airplane cut through a cable car wire at an Italian ski resort, which caused the cable car to plunge 80 meters (260 feet) to the ground, killing all 20 people onboard. One of the crewmen later destroyed incriminating evidence against himself and the rest of the crew.
4XEMJ TIL that RH null is a blood so rare, only 40 people in the world have it. It's a universal donor among many people with other rare blood types, and as such has been called the "golden blood" because its life saving capability is enormous.