  We review the search for the glass transition in water in its various
amorphous forms, and highlight the paradoxes that the search has produced.
Focussing on the glassy form of water obtained by hyperquenching, we examine
its reported calorimetric properties in the light of new findings for bulk
glassformers vitrified by hyperquenching. Like the hyperquenched bulk
glassformers, hyperquenched water exhibits a large relaxation exotherm on
reheating, as the high enthalpy quenched form relaxes to a lower enthalpy
state. When the scanning temperature is scaled by the glass transition
temperature, the bulk glassformers show a common pattern in this relaxation
exotherm. However, when the relaxation exotherm for hyperquenched water is
scaled onto the plot for the bulk glassformers using the commonly accepted
glass transition temperature for water, 136K, its behavior appears completely
different. If we require that the behavior of water be comparable to the other
cases, except for crystallizing before the glass transition (like the majority
of hyperquenched metallic glasses), then the glass transition for water must be
reset to a value of 165-170K.
