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TIL that Facebook can see every site you visit while browsing the web but only when you’re logged into your FB account.

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R7do8 TIL that the Winter Soldier’s theme contains a slowed and filtered version of Bucky’s scream during his death in Captain America: The First Avenger. You can even hear Steve yell, “Bucky!” (albeit heavily modified).
GZ04 TIL Dogs sneeze when playful so that rough playing doesn’t turn into a fight.
neQMG TIL about Aerographene, The material lighter than air and stronger than steel which can absorb 850 times it's own weight & costs $300 a gram.
yVOde TIL that nearly all mammals, from mice to giraffes, have exactly 7 cervical vertebrae in their necks; the only exceptions are sloths and manatees.
neNed TIL Cyrano de Bergerac, Badass in the 1600s, wrote about using rocket power to get to the Moon and talking earrings (headphones) used to educate children.