PHOENIX, Arizona: What happens to the body when a human gets heatstroke? How can we protect ourselves in a warming planet? To answer these burning questions, researchers in Arizona have deployed a robot that can breathe, shiver and sweat.

The southwestern American state's capital Phoenix is currently enduring its longest heat wave in history: the mercury exceeded 110 degrees Fahrenheit (43 degrees Celsius) for the 22nd day in a row on Friday, an ominous demonstration of what's to come in a world impacted by climate change.

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