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TIL: Shark teeth are actually scales; that’s why they can infinitely grow them back

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rAM4 TIL that you can embed secret messages in vocal music that emege only when multiple people start singing
0wx1v TIL that one of the top security experts at the FBI, Frank Abagnale, was also one of the most successful con-mans of all time. He posed as a pilot to travel for free on over 250 flights to 25 countries aged between 16-18, and had scammed his father out of $28k (adjusted for inflation) aged just 15.
Melx8 TIL that between 1993-2000, a man only known as “REVS”, spray painted his autobiography, page by page, all over New York City’s subway tunnels. He spray painted over 200 pages.
PbYE TIL A bank in Utah was made using parcel post delivered bricks, around one ton of bricks sent a day. After the building was completed, the regulations were changed, with the post office claiming “It is not the intent of the post office that buildings be sent through mail.”
ZpXgR TIL that after 5 years undercover in the Mafia, Joseph Pistone (aka “Donnie Brasco”) earned a $500 bonus from the FBI and a $500,000 kill bounty ($1.7M today) from the Mob