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In a monastery in northern India, a group of monks can increase their body temperature enough to dry soaking sheets in a freezing room. In an experiment, using a yoga technique known as g Tum-mo, a monk entered a state of deep meditation while other monks soaked 3-by-6-foot sheets in 49 degrees cold water and placed them over the meditator's shoulders.
A normal person cannot survive this but it wasn't long before steam began rising from the sheets. As a result of body heat produced by the monk during meditation, the sheets dried in about an hour.