Happy Tuesday Groundhogs are among the largest true hibernating species, meaning they don't just fall asleep but descend into a deep torpor. A hibernating groundhog's heart rate slows from around 88 beats per minute to just five, and during their 150-day sleep, they lose around a quarter of their body weight. So when a hibernating groundhog comes out of its den, it's time to get busy. Happy Groundhog Day! |
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