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TIL Knit spelled backwards is tink. In the knitting community to ‘tink’ is to knit backwards stitch by stitch. To go back a whole row is to ‘rip it’ and to rip the entire work (rip it rip it) is ‘frogging.’

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Y7j1Z TIL The sky movement in Van Gogh's brushwork in his Starry Night painting mimics modern scientific theories of turbulence and atmospheric physics
QJNrp In September 2015, scientists witnessed something never seen before: two black holes colliding. Both about 30 times as big as our Sun, they had been orbiting each other for millions of years. A fraction of a second before the crash, they sent a vibration across the universe at the speed of light that was picked up by the LIGO detector. So what are these ripples in space? Amber L. Stuver explains. Lesson by Amber L. Stuver, directed by Eoin Duffy.
N7Oge TIL in 2003, North Korea suggested several symbols which were included in international Unicode, later becoming emojis. They requested ☕ to mark tea houses on maps and ⚐ & ⚑ for military battles and victories. They also requested ⬆, ⬇, ⬅ (but no right arrow), ☔, ⚡, ⚠ and ⏏.
grKGX TIL When Tsarevich Nicholas(later Nicholas II) visited Japan in 1891, an attermpt on his life was made by a man wielding a katana. His cousin, Prince George of Greece, saved his life by parrying the sword with his cane
nWjWr TIL in 1959 residents of Cortez, Colorado observed a UFO landing which became a local legend. Declassified files from the US military 50 years later revealed the real incident was an emergency landing of a top secret U-2 spy plane