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Readers ask about AI ethics, monkey tool use and more - Sciencenews.org

The head and the heart Scientists used light to raise a mouse’sheart rate, increasing anxiety-like behaviors in the animal. Thestudy offers a new angle for studying anxiety disorders, BethanyBrookshire reported in “In mice, anxiety isn’t all in the head”(SN: 4/8/23, p. 9). Reader Barry Maletzky asked why strenuousexercise, which elevates heart rate, doesn’t typically induceanxiety. Heart rate isn’t everything, says neuroscientist KarlDeisseroth of Stanford University. The heart may r...
Bethany Brookshire Barry Maletzky Karl Deisseroth Stanford University Reader Barry Maletzky

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