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![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://m.psecn.photoshelter.com/img-get2/I00005WBciDHKB6c/fill=/fit=180x180/I00005WBciDHKB6c.jpg)
![Physics: Scientist, Cynthia Alviso, with two organic aerogels. The cloudy white disc is silica aerogel, whilst the red disc is an aerogel containing fibers of an organic material. Aerogel is a new material, which has very high thermal insulation and extremely low mass. It is made by drying a water-based or alcohol-based gel in a super fluid process that prevents the gel from collapsing. The resulting block of linked microscopic fibers contains about 90% air, so is very lightweight. Aerogel is being studied as a thermal insulator and as a holding medium for nuclear fusion fuel. Photographed at the Lawrence Livermore National Laboratory, USA. MODEL RELEASED [1991].](https://m.psecn.photoshelter.com/img-get2/I0000hqbklEdXBk8/fill=/fit=180x180/I0000hqbklEdXBk8.jpg)
![Physics: A blowtorch is applied to a sample of aerogel to demonstrate its insulation properties. Aerogel is a new material, which has very high thermal insulation properties and extremely low mass. It is made by adding alcohol to a conventional silica gel to remove water. The gel is then placed in a pressure chamber, and the alcohol removed under super fluid conditions. This prevents the gel from collapsing. The resulting block of silica fibers contains about 90% air, so is very lightweight. Aerogel is being studied as an insulating material and as a holding medium for nuclear fusion fuel. Photographed at the Lawrence Livermore National Laboratory, USA. [1991]](https://m.psecn.photoshelter.com/img-get2/I00009Qa8bK.lTXQ/fill=/fit=180x180/I00009Qa8bK.lTXQ.jpg)
