Baby boom in Southwestern Native Americans (Image 2)

Baby boom in Southwestern Native Americans (Image 2) 08/16/2017 01:08 PM EDT Ears of corn, or maize, from a "Basketmaker II period" cache in Colorado dating to the third century B.C. Maize was grown in the Southwestern United States as early as 2000 B.C. and by 400 B.C., the crop provided 80 percent of the region's calories. [Image 2 of 6 related images. See This is an NSF Multimedia Gallery item.   Follow NSF:  This email was sent using GovDelivery Communications Cloud on behalf of: National Science Foundation Update · 4201 Wilson Boulevard · Arlington, VA 22230 · 703-292-5111