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TIL: Facebook made about $90 per user in the US and Canada last year

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dBpj TIL the hoverboard was invented for real in April 2016. Powered by six compact jet engines totaling 1000 HP (equivalent to four automobile engines), and stabilized with Segway-like algorithmic balancing, it has a flight time of 10 minutes using a camelbak filled with jet fuel.
69E8W TIL that in April of 1861, Former President Franklin Pierce wrote to the other living former presidents and asked them to consider meeting to use their stature and influence to propose a negotiated end to the war. However, this idea was ultimately never acted on.
P0LE TIL thousands of historic maps are available for download by the Library of Congress.
awNvJ TIL USSR used remotely controlled tanks during WW2. They were called "Teletanks" and were able to recognize sixteen to twenty-four different commands sent via radio and drop armored box-bombs.
nWlLG TIL the idea for Spider-man villain Venom was purchased by Marvel’s Editor-in-Chief Jim Shooter from Marvel comics reader Randy Schueller for $220.