New radiocarbon dates for rabbit bones excavated in the 1960s at Mexico’s Coxcatlan Cave (shown here) raise the possibility that humans lived there roughly 30,000 years ago. Andrew D. Somerville Humans may have inhabited what’s now southern Mexico surprisingly early, between 33,448 and 28,279 years ago, researchers say. If so, those people arrived more than 10,000 years before folks often tagged as the first Americans (SN: 7/11/18). Other preliminary evidence puts humans in central Mexico as early as around 33,000 years ago (SN: 7/22/20). The latest evidence comes from animal bones that biological anthropologist and archaeologist Andrew Somerville and...