Biologists have discovered a growing list of creatures which freeze solidly in the winter, only to thaw out and resume life in the spring. Three species of tree frogs have been added to this list. As cold fall weather approaches, these northern tree frogs burrow under the dead leaves in the forest. Scientists found that up to 35% of the frogs’ body fluids freeze when they are cooled to several degrees below freezing. How do these frogs survive death, when freezing...
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