Survival at 40 Below The award-winning Alaskan picture book duo is back with a look at the long arctic winter. As temperatures drop and the snow deepens, the animals that make the tundra home must ready themselves for survival. Follow the arctic ground squirrel as it begins the cycle of sleeping, supercooling, and warming that will occur at least a dozen times before spring arrives. See how the wood frog partially fre... Full description