Tibetans may have undergone one of the fastest bouts of human evolution on record: Those having genes that allow them to thrive at high altitudes and low oxygen levels rose from 10% of the population to 90% in less than 3,000 years, a paper in the journal Science reports.

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Tohono O'odham Community Action Tackles Diabetes

Members of the Tohono O'odham Nation suffer from one of the highest type 2 diabetes rates ever recorded. The disease seemed inevitable in the community.

Now, the Tohono have turned to their traditional foods and recipes to combat diabetes and obesity, with striking results.

SLIDE SHOW: Harvesting the Wild Foods of the Sonoran Desert

Find out more at the Tohono O'odham Community Action (TOCA).