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TIL researchers found naturally occurring lithium in the water supply lowered suicide rates. They were able to measure lithium levels in 27 Texas counties and show those with more lithium in their water had fewer suicides. Similar studies in Greece, Austria, & Japan corroborated the results.

Read more nytimes.com

via reddit.com

l7RB5 TIL that Canadian serial killer nurse Elizabeth Wettlaufer told her pastor that she had murdered four people and the pastor kept his promise not to turn her in. She would go on to murder two others.
WkDB9 TIL dragonflies spend several years as aquatic nymphs (one to four years), while the winged adult stage last any where from a few days to a few weeks, with six months being the exception for some species.
0d5nL TIL about the "Three Hares Motif". The three hares is a circular motif appearing in sacred sites from China, the Middle East and churches and synagogues of Europe. ts origins and original significance are uncertain, as are the reasons why it appears in such diverse locations.
0wRLv TIL that it has been proven Calcium is not as good for your bones as Vitamin K. Contrary to popular belief, milk is not the best thing for your bones; aovocado, peaches and bananas are much better.
jNDLn TIL that comedian Phyllis Diller's first television appearance was on Groucho Marx's "You Bet Your Life". She said she was transitioning from housewife to nightclub performer. She was soon a nationally known star, and Groucho always took great pride in her success.