Blog post: Saturday, January 11, 2003

Excalibur, the rock that may mark a new dawn for man - "Dr Petraglia said the find was 'potentially exciting' but doubted that it was sufficient to reach such scientifically explosive conclusions about the development of the human mind. 'We often have great difficulty in assessing if something is intentional,' he said. 'Often we require more evidence than one tool.'"

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