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TIL Johnny Cash is the voice of Space Coyote in the Simpsons peyote episode

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OoZka TIL That Isaac Newton was the one who discovered that white light is comprised of all of the colors. He even created a telescope that counteracts the effect this was having on refracting telescopes.
R7VkQ TIL- Dr Heimlich at aged 96 saved choking woman with manoeuvre he invented at his retirement home. It was the first time he had ever had to use his maneovre in an emergency.
7Nrp TIL in 2014, a 23 year old female accidentally killed herself by absorbing methamphetamine via her vagina - the autopsy found a meth-filled plastic bag inside of her, and the concentration in her blood was 2.4 times the greatest concentration ever found in a human
OG46Y TIL of the Erfurt Latrine Disaster. During a meeting called by Holy Roman Emperor Henry VI, the second floor of the cathedral collapsed. 60 German nobles died when they fell through the first floor into the latrine cesspit below. Many died drowning in liquid excrement.
oBWXY TIL smartwatches measures blood preassure by emitting light to the skin and reading how much light is reflected back; as the heart pumps blood, it causes a variation in blood volume on the skin and can be detected by change in light absorption, a not-so-new technology called photoplethysmogram.