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TIL that in 2008 a team of medical scientists built a "bioartifical heart", where they took a cell-less heart framework and reseeded it with cells. By the eighth day, the structure was able to beat and pump like a natural heart.

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0dRbj TIL that, on average, half of all service dogs fail their training. Due to this poor rate, South Korea experimented with cloning service dogs that had already passed their training. The resulting clones passed at rates much higher than average.
jdYp TIL 80 percent of American seafood is imported.
97Zp TIL: Frank Sinatra hated Rock and Roll “the most brutal, ugly, desperate vicious form of expression it has been my misfortune to hear.”
b9WW0 TIL Towards the end of his life, Martin Luther King Jr. started to reconsider his fight for Integration and even said "I fear I am integrating my people into a burning house"
xJg TIL until the 18th century we had a “single-sex” view of the two bodies, where women were simply cold, “underdeveloped” men, whose penises never dropped. The vagina was an “inside-out penis,” and both men and women produced semen.