> ...their core body temperature falls to as low as −2.9 °C, or 2.3 °C below the equilibrium freezing point of their body fluids. At these body temperatures, arctic ground squirrels avoid freezing by supercooling, which refers to the metastable state that fluids enter when cooled below their crystallization temperature in the absence of catalysts of freezing, or nucleators.
From the study:
> ...their core body temperature falls to as low as −2.9 °C, or 2.3 °C below the equilibrium freezing point of their body fluids. At these body temperatures, arctic ground squirrels avoid freezing by supercooling, which refers to the metastable state that fluids enter when cooled below their crystallization temperature in the absence of catalysts of freezing, or nucleators.