In addition to using what is possibly the most ludicrous Popular Science
headline ever, this article detailed how scientists at Johns Hopkins were developing rooms that could go from boiling hot to freezing cold in a matter of minutes. Back then, being able to manipulate one's indoor climate by simply pushing a button was nothing short of a miracle. We visited Dr. H.W. Howell, director of the "climate factory" experiments at Johns Hopkins, who showed us how a complex ventilating system of heating and cooling coils, fans, water sprays, ducts, and channels let him toy with the temperature. In addition to promising comfort for the common man, Howell's experiments allowed researchers to study how temperature and climate affect people's ability to work efficiently. Being able to quickly adjust the room temperature helped them figure out that the discomfort caused by heat has more to do with how fast our hearts beat in hot weather than how our body temperature increases in hot weather.
(As far as the article title goes, scientists found that overweight subjects were much more tolerant of the heat than their skinny counterparts.)
Read the full story in "Don't Pity the Fat Man in Hot Weather"