Stone tools 'demand new American story'
The long-held theory of how humans first populated the Americas may have been well and truly broken.
Archaeologists have unearthed thousands of stone tools that predate the technology widely assumed to have been carried by the first settlers.
The discoveries in Texas are seen as compelling evidence that the so-called Clovis culture does not represent America's original immigrants.
Details of the 15,500-year-old finds are reported in Science magazine.
A number of digs across the Americas in recent decades had already hinted that the "Clovis first" model was in serious trouble.
But the huge collection of well-dated tools excavated from a creek bed 60km (40 miles) northwest of Austin mean the theory is now dead, argue the Science authors....
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Archaeologists have unearthed thousands of stone tools that predate the technology widely assumed to have been carried by the first settlers.
The discoveries in Texas are seen as compelling evidence that the so-called Clovis culture does not represent America's original immigrants.
Details of the 15,500-year-old finds are reported in Science magazine.
A number of digs across the Americas in recent decades had already hinted that the "Clovis first" model was in serious trouble.
But the huge collection of well-dated tools excavated from a creek bed 60km (40 miles) northwest of Austin mean the theory is now dead, argue the Science authors....