The hot spot: World Sauna Congress convenes in Oslo as global interest skyrockets - NPR

Sauna360 Tylö Halmstad and Kiruna Hybrid saunas have been recalled due to a fall risk.

Sauna scientists Dr. Hans Hägglund (from left), Earric Lee and Ashley Mason take a steam in the Japanese sauna at The Well in Oslo, Norway. They are part of a group of international researchers studying the potential health benefits of sauna and other heat therapies. For more on the science of healthy living, try NPR's Health newsletter. Scientists have long marveled at how the human body tolerates extreme heat — and what that means for our health. In the late 1700s, British scientists ran bold experiments on thermoregulation, subjecting themselves (and a dog) to a piping hot room and observing that — unlike the steak and eggs accompanying them — their own bodies did not cook.