Ancient baby boom in American Southwest exceeded modern birthrates

The grandeur of Mesa Verde’s cliff-side dwellings and the awe-inspiring engineering feats of Chaco Canyon attest to the vibrant cultures that flourished in the American Southwest more than 1,000 years ago. At these sites, ancient civilizations monitored the motions of the cosmos, developed...



via L.A. Times - Science http://ift.tt/1qh1LWZ