History Of Ancient America
Ancient humans may have reached Americas 100,000 years earlier than thought, scientists say in controversial study
Most genetic and archaeological evidence shows humans first entered the Americas some 15,000 years ago. But a study nearly 25 years in the making in this week's "Nature" journal finds that the 130,000-year-old bones of a mastodon, an extinct relative of the mammoth, unearthed in California were split open with blows from rocks. Rocks discovered near the bones bear the hallmarks of use as hammers, the scientists report. The smashed bones may have been the handiwork of a Neanderthal, the scientists say, or the more ancient human relative called Homo erectus, or even our own species, Homo sapiens. Experts not involved in the study, however, question the claim, in part because of the total lack of other evidence of a human presence so long ago. Ref. USAToday.