The team analyzed tooth enamel for ratios of a strontium isotope, a naturally occurring metal found in food and water. Levels of the metal vary in different areas.
Eleni Panagopoulou of the Paleoanthropology-Speleology Department of Southern Greece said the tooth's levels of strontium showed that the Neanderthal grew up at least 12.5 miles from the discovery site.
"Our findings prove that ... their settlement networks were broader and more organized than we believed," Panagopoulou said.
Clive Finlayson, an expert on Neanderthals and director of the Gibraltar Museum, disagreed with the finding's significance.
"I would have been surprised if Neanderthals didn't move at least 20 kilometers (12.5 miles) in their lifetime, or even in a year...We're talking about humans, not trees," Finlayson said.
