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ScienceNOW: “Thanks to warming temperatures in Colorado, yellow-bellied marmots (Marmota flaviventris) have been getting up earlier from hibernation each year, giving them more time to feed. As a result, they grow about 10% bigger than they used to. That extra weight helps the marmots survive longer, giving each group time to produce an average of 14 more little yellow-bellies a year than did their predecessors.”