A new study suggests we sleep because our brains are too hot . The idea is that if it 's hot , but still cool enough so that a large intake of air will bring your body temperature down Researchers at the University of Vienna tested subjects in California and Arizona . Location , season , age , sex , time spent outside , and amount of sleep did not have an effect .
A new study suggests we sleep because our brains are too hot . Researchers at the University of Vienna tested subjects in California and Arizona . Location , season , age , sex , time spent outside , and amount of sleep did not have an effect .