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This is Scientific American 60-Second Science. I'm Karen Hopkin. This'll just take a minute.

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Pack rat.

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The name is synonymous with hoarding.

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And researchers have learned that pack rats can actually increase the range of foods they're able to eat because of their collection of gut bacteria.

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Pack rats live in the American Southwest, where they nosh on the native vegetation.

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Some of these plants produce protective toxins, for example the junipers in the Great Basin desert or the creosote bushes of the Mojave.

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But pack rats seem to eat these noxious shrubs with impunity.

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The researchers found that pack rats from the Mojave harbor gut bacteria that can break down creosote.

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When antibiotics depleted the pack rats' gut bacteria, the animals suddenly found creosote nearly indigestible.

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Further, the researchers found that they could take pack rats from the Great Basin,the ones that eat juniper and give them the ability to eat creosote.

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All they needed was a fecal transplant, which supplied the necessary gut bacteria from their Mojave-based neighbors.

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The work appears in the journal Ecology Letters.

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The findings show the importance of gut bacteria for eating some otherwise dicey foods.

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They could also allow farmers to expand the diet of their livestock.

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Cows with the right gut bacteria could feast on what was formerly feh.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Karen Hopkin.

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