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TIL Japanese knotweed is listed by the World Conservation Union as one of the world’s worst invasive species. It damages concrete foundations, buildings, flood defences, roads and architectural sites. In 2010, the UK released into the wild a Japanese insect that feeds on Japanese knotweed.

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x6egk TIL Cataract Surgery was done as early as the 5th century BCE using “couching” and evolved to use a syringe in the 11th century in the medieval Islamic world
Gbr1 TIL of Ayaan Hirsi Ali, a Somali-born woman who was a victim of genital mutilation and married off to her cousin. She escaped and sought asylum in the Netherlands, eventually being elected to Dutch parliament. She is now an activist for women’s rights and opposes honor violence and child marriage.
VBEgm TIL about Kim Kahana. He survived a firing squad in the Korean War and later was the sole survivor of an airplane crash that killed 32. He earned a Silver Star, 2 Bronze Stars and 2 Purple Hearts. He has 6 black belts in karate, aikido and jujutsu. He has a long and successful career in films.
Eg4Ap TIL : Tarzan actor and Olympic swimmer Johnny Weismuller and his brother were swimming in Lake Michigan when they saw a boat capsize. They pulled at least 14 people from the water, and 11 of those people survived.
kOKbB TIL of Inochi Tendenko (go separately) - the maxim in tsunami prone areas of Japan that dictates that the individual need not stay and help others but should run and preserve his or her life instead