In 1850, a German physician named Carl Reinhold August Wunderlich began taking his patients’ temperature. Over the next eighteen years he would measure the internal body heat of some 25,000 people who ...

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Amid crisis and disruption, we crave the calm of normality. But can we ever really define what “normal” is? I’m writing this in my home office, wearing my bathrobe. I am currently placed under a ...