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TIL: There is an image that, if stared at for 15 minutes, will "burn in" for up to three months. Researchers call it the "McCollough Effect"

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KO4Wa TIL that barns are red because farmers made their own sealant using linseed oil and rust. The rust protects the wood from algae and fungal growth but also colors the mixture red.
ne4QW TIL The Soviet KGB fabricated evidence linking the Central Intelligence Agency to the assassination of President John F. Kennedy and passed the material to unwitting conspiracy theorists in the United States, according to the Mitrokhin Archive based on KGB files brought to the West by a defector.
JW0Q TIL of an Indian elite chef, about to take a new job in Switzerland was visiting family back home when he witnessed a starving old man eating feces for food. He was so shocked by the incident that he decided right there the he would instead spend the rest of his life feeding the poor and destitute.
VB0a0 TIL the air quality in Delhi, India, is on average between 200-500 AQI (poor to hazardous) from October through February. The worst was on November 8th 2017 during the “Great Smog of Delhi” when the smog reached its peak at 999 AQI.
9xkp TIL more rain falls on a Saturday than any other day, thanks to a seven-day dust cycle caused by traffic and industrial activity during the working week. Since Nature doesn’t generally follow 7 day patterns, they’re a human invention.