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"Topper is the oldest radiocarbon dated site in North America," Goodyear says.

"However, other early sites in Brazil and Chile, as well as a site in Oklahoma also suggest that humans were in the Western Hemisphere as early as 30,000 years ago to perhaps 60,000." In 1998, Goodyear, nationally known for his research on the ice age Paleo Indian cultures dug below the 13,000-year Clovis level at the Topper site and found unusual stone tools up to a meter deeper.

For five years, Goodyear continued to add artifacts and evidence that a pre-Clovis people existed, slowly eroding the long-held theory by archaeologists that man arrived in North America around 13,000 years ago.

Last May, Goodyear dug even deeper to see whether man's existence extended further back in time.

He is also the founder and director of the Allendale Paleo Indian Expedition, a program that involves members of the public in helping to excavate Paleo American sites in the central Savannah River Valley of South Carolina.

In October 2005, archaeologists will meet in Columbia for a conference on Clovis and the study of earliest Americans.May 2000 — Geology study done by consultants; ice age soil confirmed for pre-Clovis artifacts.May 2001 — Geologists revisit Topper and obtain ancient plant remains deep down in the Pleistocene terrace.The Topper excavation site is on the bank of the Savannah River on property owned by Clariant Corp., a chemical corporation headquartered near Basel, Switzerland.He recovered numerous stone tool artifacts in soils that were later dated by an outside team of geologists to be 16,000 years old.

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