› added 9 years ago

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TIL: There are more people living in slavery today than at any time in human history.

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via reddit.com

RM91 TIL that the oldest commissioned naval vessel in the world is the USS Constitution. She was launched in 1797.
Qg96 TIL that Arnold Sommerfield, a theoretical physicist, was doctoral supervisor to 4 physicists who went on to win Nobel Prizes in physics, and academic supervisor to 2 others who also won. He himself was nominated 81 times.
yVjkl TIL the novel "The Wreck of the Titan" was written in 1898, before the real Titanic was even an idea. Like the Titanic, the fictional ship sank after wrecking on an iceberg in April in the North Atlantic Ocean, and there were not enough lifeboats.
yRl8 TIL There are 30 kilometres of tunnel underneath downtown Toronto, connecting shops, subway stations and restaurants so people do not need to go outside into the heat and snow
OGV5a TIL Adults with ADHD and SOI: Had their onset of melatonin an average of 1.5 hours later than normal, which correlated with falling asleep much beyond their bedtime.