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TIL that the human eye is known to have internal circadian rhythms, and that morning-circulating-melatonin levels (a circadean/sleep health issue) were measured almost three times higher in people who are near-sighted/myopic

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Rl86 TIL a 17-year-old boy once tried to build a nuclear reactor in his backyard. Although his homemade reactor never achieved critical mass, it ended up emitting dangerous levels of radioactivity
VMwmk TIL at the 1912 Olympics, a marathon runner quit and went home to Japan without telling officials and was considered a missing person in Sweden for 50 years. In 1966, he was invited to complete the marathon. His time: 54 years, 8 months, 6 days, 5 hours, 32 minutes and 20.379 seconds.
JYkw1 TIL that wood ants practice chemistry, and will synthesize an antibiotic substance using tree resin and formic acid to protect the health of their colony. It is considered to be the most advanced act of evolutionary pharmacology seen in the animal kingdom
M7LM0 TIL that nicotine, as well as being present in tobacco, is also present in tomatoes, potatoes and eggplants. it provides natural protection against insects, and has been used as a pesticide since at least the 17th century.
WkPYB TIL it has been established so far that 928 prisoners attempted to escape from the Auschwitz concentration camp complex (878 men and 50 women). For 196 prisoners the escape finished with success and the majority of them lived to see the end of the war.