Sentences with phrase «leave conclusive evidence»
Most archaeologists would tell you it couldn't have been humans, who didn't leave conclusive evidence of their presence in the Americas until about 14,000 years ago.
http://www.sciencemag.org/ Not exact matches
Other investigators have suggested the Sahara became drier at the time people left, but the evidence was not conclusive, said Tierney, a UA associate professor of geosciences.
This is not conclusive evidence of an overshoot in leaf development that stressed the trees in drier years but it does give some support to that hypothesis that an imbalance in leaf to stem growth ratios reduces tree vigor, making trees more vulnerable to disturbance.