Why bears choose the harshest season to give birth

Bears Have Babies While They’re Hibernating · 3:47 · Video: SciShow · Watch at the source

In short: During winter, bears enter a state of extreme energy conservation, skipping meals and even waste elimination. This video explores the biological mystery of why they choose this period of scarcity to bring new life into the world.

To survive the winter when food is scarce, bears undergo significant physiological changes, forgoing eating, urinating, and defecating to conserve energy. Despite these harsh conditions, bears specifically use this period of hibernation to give birth.

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