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    Katelin Cruz uses a phone and FitBit to submit data about her mood and other metrics to Harvard researchers studying suicidal tendencies. “I think it’s almost easier to tell the truth to a computer,” she said.
    CreditKayana Szymczak for The New York Times

    Can Smartphones Help Predict Suicide?

    A unique research project is tracking hundreds of people at risk for suicide, using data from smartphones and wearable biosensors to identify periods of high danger — and intervene.


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    How Painful Should Your Workout Be?

    Every strenuous exercise involves some mixture of suffering and pleasure. The key to sticking with it is getting the balance right.


The Covid-19 Pandemic

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