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quote:Tardigrades have been known to withstand the following extremes whilst in this state:Temperature—Tardigrades can survive being heated for a few minutes to 151 °C or being chilled for days at -272.8 °C (almost absolute zero). Radiation— Shown by Raul M. May from the University of Paris, Tardigrades can withstand 5700 grays or 570,000 rads of x-ray radiation. (Five grays or 500 rads would be fatal to a human). Pressure—They can withstand the extremely low pressure of a vacuum and also very high pressures, many times greater than atmospheric pressure. In theory, they could even survive the vacuum of space.