Researchers have discovered seasonal changes in the gut microbes of brown bears, which apparently help the beasts cope with the demands of hibernation. In faecal samples from 16 wild bears, scientists found a bug population that was more suited to depositing fat in summer, and burning it in winter.

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Researchers have discovered seasonal changes in the gut microbes of brown bears, which apparently help the beasts cope with the demands of hibernation. In faecal samples from 16 wild bears, scientists found a bug population that was more suited to depositing fat in summer, and burning it in winter.