As extreme heat gripped much of the world in summer 2023, many people struggled to stay cool. They weren’t the only ones. Using electricity-gobbling giant barn fans and misting machines that sucked thousands of gallons of water, farmers did all they could to keep their dairy cows from overheating, which not only stresses the cows, but also leads to reduced milk production.
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Jason Daley is a science writer for the University of Wisconsin-Madison College of Engineering.





