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TIL Tom Lehrer’s (of ‘Element Song’ fame) song 'The Old Dope Peddler’ is sampled in 2 Chainz’s song 'Dope Peddler’. When asked for permission he responded: “As sole copyright owner… I grant you motherfuckers permission to do this. Please give my regards to Mr. Chainz, or may I call him 2?”

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d8NvK TIL that Charles Kelman, a pioneer of phacoemulsification, a modern cataract surgery method, was also a successful jazz musician, entertainer and Broadway producer. He regularly appeared on TV shows in the 70's and 80's in part to promote his surgical innovations.
0r6p TIL in 2006 over a 1000 toads swelled up to 3 times their size and exploded with no apparent reason, causing panic at the possibility of a new virus. The real reason? Local crows had figured out how to peck out the frog’s highly nutritious liver while avoiding their poisonous skin
epEXJ TIL the diffusion of responsibility is the phenomenon where individuals in a group are less likely to take action or feel responsible, assuming others will do so. This often leads to inaction in situations where help is needed.
9wQlr TIL, Contrary to what I was taught in school - The Great Wall of China is NOT visible from the moon or space in general. At best, it is visible from the low orbits under very favorable weather conditions. Some other earthly structures, e.g., desert roads, have much higher visibility from space.
YparB TIL that pricetags are a recent concept invented by the Quakers who believed it was morally wrong to charge different prices to different customers for the same product