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TIL about The Stroop effect, our tendency to experience difficulty naming a physical color when it is used to spell the name of a different color.

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Y7jWW TIL that the Lake St. Louis, Missouri fire department displays “Keep Back 343 Feet” on the back of their fire trucks not only as a safety reminder, but specifically in remembrance of the 343 firefighters lost on 9/11.
ZwQ TIL that the novel Fahrenheit 451 was first published in Playboy magazine.
J1Ln1 TIL the country with the most French speakers isn't France but the Democratic Republic of Congo. Likewise, there are more French speakers in Kinshasa than in Paris Of the 212 million who use French daily, 54.7% are living in Africa.
WVV4 TIL that in the late 1970s, the US Government sprayed Paraquat (a deadly herbicide) on Mexican Cannabis fields and subsequently warned Americans that the chemical rendered Marijuana unsafe to smoke in order to deter users.
7KW7 TIL that a double-blind study which was published in Nature showed that experienced astrologers are no better at determining people’s psychological traits based on the location of the stars during their birth than someone who is randomly guessing them.