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TIL about Princess Sophia Duleep Singh, who was a prominent suffragette in the United Kingdom. She was the daughter of Duleep Singh, the last Maharaja of Punjab. She played a leading role in the Women's Tax Resistance League and was instrumental in winning women their right to vote.

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ENQd TIL If a Helicopter’s engines fail midair they use a state of flight called ‘autorotate’, which allows them to land safely. This system uses air going up towards the main rotors as the chopper is falling; causing the main rotors to spin and generate enough lift for a controlled emergency descent.
jAZa TIL Mozilla Foundation did a study of Googles Incognito Browser. They found it was used for an average of 10 minutes from the hours of 11pm to 5am, peaking at 2 am.
0wOep TIL H-Alpha telescopes designed for the Sun shows surface granulation, movement on the Sun, and the prominences coming off the side. White light telescopes with filters can only show spots on the Sun, with very little granulation
JeWQ TIL a father and young son were kidnapped and brought to a construction site where the kidnappers cut the father’s throat from ear to ear, shot the son 3 times, then the kidnappers buried them. The father escaped, walked ¼ mile, and flagged down a police officer. He survived. The son did not.
y0kl TIL that first widely spread computer virus, “Brain” was not malicious. It was made by two brothers from Pakistan, and even included their phone and address in the code so people could let them know they got it.