Human Ancestors Created Tools Continuously for 300,000 Years
Goodness gracious, Friends, do I love the science of tree-ring dating!
My dissertation research, which I published in 1997 as Time, Trees, and Prehistory, explored the 15-year-long effort, from 1914 to 1929, in which Andrew Ellicott Douglass, an astronomer at the University of Arizona (UA) here i...
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