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TIL Some Green Victorian Books Were Colored with Arsenic and are Considered Poisonous

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dpB7 TIL that between 1969 and 1972, there were 276 hijacked airplanes (an average of about 1 every 5 days).
5Yob8 TIL that David Attenborough is the only person to have received BAFTAs for programs in five different video formats: black and white, colour, HD, 3D and 4K.
5YWyR TIL that a square-shaped building with a volume of 1.2 billion cubic meters could fit inside Earth's entire human population.
WkBK8 TIL the deepest hole in the world is 12 miles deep, 9 inches wide, and took 2 decades to drill
nxwG TIL that if a song is close to 60 beats per minute and people start to breathe in time with the music it starts to slow their heart rate and make people feel more relaxed