Swearing improves grip strength, Halloween sees a spike in child ADHD diagnoses, and more 2024 learnings

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Kent Hendricks, a marketing professional at HarperCollins Publishers, has read a book or two each week since 2007. This week, he shared his fascinating list of "52 Things I Learned in 2024." Here are some of them:

• Doctors are 14% more likely to diagnose a child with ADHD on October 31, not because there are more kids wi…