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TIL the Hawthorne Effect is when an individual modifies their behavior because they are being observed. Somewhat like a placebo effect, the novelty of being a research subject and the increased attention could lead to behavior changes that result in false positive & inaccurate experiment conclusions

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w6KY TIL the chills experienced when listening to music is a result of the brain releasing dopamine in anticipation of the peak moment during a song.
DevY TIL when Igor Stravinsky’s ballet “The Rite of Spring” premiered in 1913 Paris, the audience was so shocked that loud derisive laughter and jeers forced the performance to stop. Pandemonium ensued when people in the audience began fighting and throwing things at the orchestra.
9YGZG TIL every Shih Tzu alive today can be traced to one of 14 dogs — seven males and seven females — that were used to rebuild the breed when China underwent its Communist Revolution.
kJorm TIL that after Sam Cooke sang "A Change is Gonna Come" on The Tonight Show (Feb 7, 1964), the network lost the only recording of the performance. Cooke elected never to perform it again in his lifetime (he was murdered in Dec of '64), due to the song's complexity and ominous nature.
nerdY TIL that the common saying "you can't have your cake and eat it too" was originally phrased "you can't eat your cake and have it too." This conveys the meaning of the expression much more clearly, since once you eat a cake, you can no longer have it.