Grizzly bears' circadian rhythm keeps on ticking, even when they are in hibernation, a new study shows.
Carbon dioxide may calm bumble bees down, but a new study shows it can also trigger a physiological responses involved with reproduction.
Animals have a few ways to survive cold temperatures, but it's not an either-or. "Each cold-survival strategy exists not as a binary but on a spectrum."
New research with flesh flies clarifies how the insects switch from dormancy to arousal. The findings raise some sci-fi possibilities.
New findings suggest that "entering into a hibernation-like state is not a relatively new type of adaptation. It is an ancient one."
A new hypothesis may clarify how European cave bears went extinct. The bears may not have been able to change their diets because of their sinuses.
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