VALLEYFORD, Wash. – Vinnie Pecht has a very simple description of what he does for a living. “I basically engrave rocks,” said Pecht, the owner of Industrial Custom Creations. “So whatever somebody ...
How do you find out the age of ancient rock art? And more importantly, how can you do that without disturbing the site? Meinrat and Tracey Andreae of the Max Planck Institute for Chemistry recently ...
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