Poison -- It's What's For Dinner: Hunt Narrows For Genes That Let Packrats Eat Creosote

As the US Southwest grew warmer from 18,700 to 10,000 years ago, juniper trees vanished from what is now the Mojave Desert, robbing packrats of their favorite food. Now, biologists have narrowed the hunt for detoxification genes that let the rodents eat toxic creosote bushes that replaced juniper. The have identified 24 candidate genes.

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