Inventions: Who Were First Americans?

Who Were the First Americans? It has long been the belief that the first Americans migrated from Asia some twelve thousand years ago by crossing the then frozen Bering Strait. In 1932, stone artifacts were found alongside mammoth bones in Clovis, New Mexico that supported this theory. In recent years, however, new evidence and discoveries challenge those beliefs. These new discoveries pre-date the Clovis artifacts and are located in different parts of North and South America. Along with those new discoveries, new theories have developed as to when, where, and how the first Americans arrived.
For example: In 1973 James Adovasio, a young archaeologist from the University of Pittsburgh began excavating a sight known as the Meadowcroft Rockshelter outside of Avella, Pennsylvania. Adovasio uncovered an ancient campsite under a protective rock overhang that dated back sixteen thousand years - approximately four thousand years before the crossing of the Bering land bridge. While fire pits have been the most commonly found artifacts, human modified objects made of stone, wood, and bone have
Along a small creek located 500 miles south of Santiago, the most well preserved site of a possible pre-Clovis civilization was found. The remnants of at least twelve wooden structures, hundreds of stone artifacts, medicinal plants, and mastodon bones were found preserved in the peat bog. Despite these findings, it took the archeological community over twenty years to validate the site. In 1997, a group of archeologists sponsored by The Dallas Museum of Natural History visited the site and confirmed its authenticity. Through their observations, all agreed that this site pre-dated the New Mexico discovery by over a thousand years. This confirmation by these archeologists had changed the near 70 year belief that the earliest record of human existence in the Americas was now in Monte Verde,