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TIL that with a budget of $25,000 and a profit of $22.5 million, the film with the highest percentage of return on investment (90,000%) is 1972‘s “Deep Throat”.

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Gnm1 TIL that John Adams, founding father of the U.S., called his wife “Miss Adorable” and demanded a million kisses in one of the first letters he ever wrote her.
5V7Qk TIL there's a whole gum wall in Seattle and 2,350 lbs (1,070 kg) of gum was removed in 2015!
jMPv TIL of Dragonskin a new generation of body armor. In one test this armor was shot by 150 rounds of various calibers of bullets including steel core rounds. It took a grenade at point blank range to damage the armor and yet was not enough to break through.
xVpv7 TIL Space Invaders released in 1978 is the highest grossing entertainment product of all-time. By 1982 it had grossed $3.8 billion equal to over $13 billion today adjusted for inflation. The game was so popular it led to 100-yen coin shortages in Japan.
eOyL TIL there is a street in London where houses sell for an average of £65,000,000