Ancient seaweed chews confirm age of Chilean site

By Maggie Fox, Health and Science Editor

WASHINGTON (Reuters) - Bits of chewed-up or burned seaweed discarded more than 14,000 years ago confirm that people were in Chile at least that long ago and shed light on what their culture was like, researchers reported on Thursday.

The findings at a site 10,000 miles from the Bering Strait add to an almost overwhelming pile of evidence that people were well distributed across the western Americas long before the so-called Clovis culture 13,000 years ago.

And the seaweed picked up at the Monte Verde site provide a direct link to people living in the area today, some of whom also use some of the seaweed species medicinally.

"What we have found ... are nine species of seaweed that are coming from rocky and sandy beaches located about 55 kilometers (35 miles) west of the site," said archeologist Tom Dillehay of Vanderbilt University in Nashville, Tennessee, who led the study.

"It indicates to us that the people of Monte Verde had a much stronger coastal industry than we thought previously. It indicates to us that we might be talking about people who initially entered into the Monte Verde site from the Pacific coastline itself," he told reporters in a telephone briefing.

The Monte Verde site 500 miles south of Santiago has long been controversial. Discovered in 1977, its contents have been carbon-dated to more than 12,000 years ago -- dates that careful calibration using tree rings and other information suggest are actually more than 14,000 years old.

CONTRADICTING CONVENTIONAL WISDOM

This clashes with the one-time conventional wisdom that humans first crossed from Siberia using a land bridge over the Bering Strait about 13,000 years ago and then spread over the American continents.