› added 4 years ago

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TIL that Martin Luther King, Jr. Improvised the iconic part of ‘I Have A Dream’

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x65J7 TIL that Canada produced over 800,000 military trucks during WW2, more than Germany, Italy & Japan combined. In 1945 the Canadian Army had 1 vehicle for every 3 soldiers (the US Army had 1 for 7), making it the most mobile army on earth.
w0W1 TIL while Alfred Hitchcock was filming ‘The Pleasure Garden’, an actress refused to enter the water because she was on her period. It was the first time Hitchcock heard about menstruation, and a cameraman had to explain to him what she meant.
d8DWd No one is entirely sure. Water has high surface tension, yet the molecules at its surface are unstable, which makes the air-surface interface mysterious and difficult to describe. Satoshi Nihonyanagi, a researcher at a molecular-spectroscopy lab in Japan, studies water and its surface—"specifically probing the interface," he calls it—using isotopically diluted H2O, which doesn't vibrate and is easier to observe. He's found that some water molecules are bound to others by a single hydrogen bond.
VMyYQ TIL In Finland When Temperature Reaches -35°C, Snow Covering Trees Yield Some Of The Most Striking Shapes In Nature.
awydN TIL the first gravitational waves directly observed by LIGO required detecting a wobble in space time 1000 times smaller than the nucleus of an atom. This wobble was originally caused by black holes colliding 1.3 billion light years away.