The emergent properties of water contribute to the suitability of the environment for life. Until fairly recently, scientists assumed that


The emergent properties of water contribute to the suitability of the environment for life. Until fairly recently, scientists assumed that other physical requirements for life included a moderate range of temperature, pH, atmospheric pressure and salinity as well as low levels of toxic chemicals. That view has changed with the discovery of organisms known as extremophiles, which have been found flourishing in hot, acidic sulfur springs, around hydrothermal vents deep in the ocean, in soils with high levels of toxic metals, and even in the reactors at Chernobyl! Why would astrobiologists be interested in studying extremophiles


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