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TIL that scientists found a drug called Tideglusib that can repair cavities by re-growing teeth

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E186p TIL that if you took out all of the empty space from between and within the atoms making up each human being, the entire human race would fit into the volume of a sugar cube.
9Y7GG TIL that acacias, the trees whose leaves are eaten by giraffes, release an airborne chemical called ethylene. Ethylene alerts nearby acacia trees to produce tannin, a toxin that makes the leaves poisonous, and lethal if over-consumed. Giraffes try avoiding this by eating trees downwind from another.
j6XZj TIL that Philip Gale was a child prodigy who killed himself at age 19 by jumping from a classroom window. Before he did it, he wrote on the blackboard Newton's equation for how an object accelerates as it falls, along with a sketch of a stick figure tossing a chair. He signed it, " Phil was here. "
wLP9E TIL in 2007, reigning Jeopardy! champion Scott Weiss purposely placed his final bet in such a way as to force the first three-way tie in the game's history. He said he knew he could have bet more and won the game, but thought it would be fun to force a tie instead.
KOEJ4 TIL that in 2007, the islet of Pontinha became an independent nation after the owner, Renato Barros, an art teacher, noticed a legal loophole in the sale charter issued by the King of Portugal in 1903.