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TIL that fake oil paintings can be detected because of nuclear bombs detonated in 1945 because of the fact that isotopes such as strontium-90 and cesium-137 that can be found in oil did not exist in nature previously. If a picture contains these isotopes, it is certainly painted after year 1945

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9EyQ TIL that the standard-sized paper sheet in the western world (A4) is based on a factor of √2. The reason for this is so if you fold it lengthwise every time, it maintains the same length-to-width ratio, large or small.
e0BEJ TIL During WW2 Joe Medicine Crow, a native American, completed all four feats required to be a war chief: touching an enemy without killing him, taking an enemy's weapon, leading a war party and stealing 50 horses from the SS, singing a Crow honour song as he rode away.
9X5Q TIL that even though a Giant Panda’s diet consists of 99% bamboo shoots, it is technically a carnivore.
dDka8 TIL: How North America made Britain fund their own invasion by Napolean(Part of the War of the Third Coalition)
mxNdx TIL that Sir Patrick Stewart and Sir Ian McKellen never played chess in their life until the movie X-Men required them to do so. A chess master came in to teach them.