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TIL that regular daytime naps longer than 1 hour are linked to a higher heart disease risks and mortality, but short naps under 30 minutes have no positive or negative effect on heart health

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via reddit.com

p86Gb TIL about the Tuskegee Study of Untreated Syphilis, a clinical study on African American men where they went deliberately untreated by medical professionals as part of a 40-year experiment by the US Public Health Service. Cited as "arguably the most infamous biomedical research study in U.S history"
d8AWd TIL: British author Agatha Christi absolutely detested her character Hercule Poirot, even going as far as to call him, "A detestable, bombastic, egocentric, little creep." She only kept writing books about his adventures at the behest of her editors, because they sold so well.
0wKwp TIL that Robert Wang, inventor of the Instant Pot reads every review of his product. When one customer commented that it would be nice if it could make yogurt, he created a new model that could do that, then sent the reviewer the new model as a thank you. He still reads every review.
wLMwM TIL: the eye may have evolved, independently, as many as 40 times
5BBn TIL Netherlands Closed Eight Prisons Due To Lack Of Criminals