Who Invented Air Conditioning?

With the U.S. in the midst of a massive heat wave during one of the warmest years on record, it is, in a word, hot. As temperatures rise—and look to keep rising over the coming years—the dangers of remaining outside for too long are very real. And so is the relief that comes with entering an air-conditioned building.

For that, today's hot and sweaty masses have the engineer Willis Carrier to thank.