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TIL For a brief period in 1930 in the US you could purchase special postage stamps to have your letters delivered via zepplin

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GAwJ4 TIL the emperor penguin is a very powerful bird. In one case, a crew of six men, trying to capture a single male penguin for a zoo collection, were repeatedly tossed around and knocked over before all of the men had to collectively tackle the bird, which weighs about half as much as a man.
Vlkp TIL Snapchat’s expired snaps are not deleted, just hidden
5Y4Wp TIL that in September 1985 John Denver, Dee Snider, and Frank Zappa testified before a US Senate committee in opposition to warning labels on records notifying consumers of explicit lyrical content involving sex and violence.
ZpmnQ TIL that a production flaw meant CD's manufactured by the UK branch of Philips and Dupont Optical (PDO) between 1988 and 1993 would be able to react with their own paper booklets and be rendered unreadable.
P9vw TIL The material Magic Erasers are made of, melamine foam, is as hard as glass and actually scrapes away stains.