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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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VBvpD TIL: about Krystyna Skarbek, a Polish agent of the British Special Operations Executive (SOE). She became a British agent months before the SOE was founded in July 1940. She was the first female agent of the British to serve in the field and the longest-serving of all Britain's wartime women agents.
GYdLQ TIL the main cause of "soft errors" in computer memory is cosmic rays. Systems buried in caves have a negligible rate of cosmic-ray induced soft errors; computers on mountains have a far higher error rate than at sea level; and the rate of errors in aircraft can be over 300 times the sea level rate
XEdAR TIL that in the weeks following the 2001 September 11 attacks the children's act The Wiggles were one of the only groups that would perform in New York, which earned them loyalty and respect, as many acts cancelled.
NREJ TIL: The longest recorded time spent awake was set in 1965 a high school student stayed awake for 264 hours (about 11 days)
d8XPr TIL Dr. Gay Hitler, son of George Washington Hitler, was a well-respected dentist living in Circleville, Ohio. Because Adolf Hitler misspelled his grandfather's surname "Hiedler", the Hitlers of Ohio are likely the only true Hitlers