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TIL: Leonardo da Vinci Hid Invisible Drawings in His Sketches and High Tech Scanners Have Brought Them to Light

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5YN4B TIL in 2016 a man fatally stabbed 19 people and injured 26 others (most in their sleep) at a care home in Japan in an attempt to advocate the euthanasia of disabled people
GA167 TIL that the record for Highest Typing Speed ever recorded was set 76 years ago using a Typewriter.
pYZMb TIL Stan Lee is the highest box-office grossing actor, in any role, of all time at $30,601,574,433 across 50 films
eMD6 TIL a Baltimore man in 1928 built a rocket in attempt to fly to Venus using 50 gallons of gasoline as fuel, steel pipes as engines, and several layers of sailcloth covered in varnish to make it airtight.
Arp7 TIL It took the Wizard of Oz’s studio art department almost a week to settle on the final shade of yellow used for the Yellow Brick Road.