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Peter Menzel Photography
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![Proton decay experiment to determine the ultimate stability of matter..Proton decay. A technician [works with] a 20" (50cm) photomultiplier tube used in the search for proton decay. Hundreds of such tubes line a tank containing 9000 tons of water some 1000 meters underground in a zinc mine in Japan. Tokyo University's Kamiokande experiment was designed to look for decaying protons. If a proton decays, the charged particles it generates move through the water faster than light, and so generate blue 'Cerenkov' radiation. It is this that the photomultipliers detect. Computers then decide whether the event was a decay, or a collision with a solar neutrino. Japan. (1985)](https://www.menzelphoto.com/img-get2/I0000uvdBlshQGUM/fill=/fit=180x180/I0000uvdBlshQGUM.jpg)
![Hypothermia Research: Research on exercise in cold water, part of an assessment of exercise regimes for victims of multiple sclerosis (MS). Here, at the University of Minnesota Hypothermia laboratory in Duluth, a volunteer rides an exercise bicycle while immersed in cold water at a temperature of 50 degrees Fahrenheit. A variety of probes measure his vital functions, skin & core body temperatures. The tube connected to his mouth delivers a monitored air supply. People afflicted by MS need regular exercise, but the rise in body temperature this provokes often causes uncontrollable shaking. Exercise in cold water helps counter this effect. MODEL RELEASED [1988] .Hypothermia is a medical condition in which the victim's core body temperature has dropped to significantly below normal and normal metabolism begins to be impaired. This begins to occur when the core temperature drops below 35 degrees Celsius (95 degrees Fahrenheit). If body temperature falls below 32 °C (90 °F), the condition can become critical and eventually fatal. Body temperatures below 27 °C (80 °F) are almost uniformly fatal, though body temperatures as low as 14 °C (57.5 °F) have been known to be survivable. [[http://encycl.opentopia.com/term/Hypothermia]]](https://www.menzelphoto.com/img-get2/I00005WBciDHKB6c/fill=/fit=180x180/I00005WBciDHKB6c.jpg)
![Hypothermia Research: Research on exercise in cold water, part of an assessment of exercise regimes for victims of multiple sclerosis (MS). Here, at the University of Minnesota Hypothermia laboratory in Duluth, a volunteer rides an exercise bicycle while immersed in cold water at a temperature of 50 degrees Fahrenheit. A variety of probes measure his vital functions, skin & core body temperatures. The tube connected to his mouth delivers a monitored air supply. People afflicted by MS need regular exercise, but the rise in body temperature this provokes often causes uncontrollable shaking. Exercise in cold water helps counter this effect. MODEL RELEASED [1988]](https://www.menzelphoto.com/img-get2/I0000r6eQEbM6pOk/fill=/fit=180x180/I0000r6eQEbM6pOk.jpg)
