California fossils, stone tools may rewrite New World human history

By Will DunhamWASHINGTON (Reuters) - In what may be one of the most significant discoveries ever in archeology in the Americas, researchers on Wednesday said stone tools and broken mastodon bones unearthed in California show humans had reached the Americas by about 130,000 years ago, far earlier than previously known.The researchers called five rudimentary tools -- hammerstones and anvils -- discovered in San Diego County alongside fossil bones from the prehistoric elephant relative compelling e