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This California Forest Has a Tree That's Nearly 5,000 Years Old. But Its Location Is a Closely Guarded Secret
The arid mountain forest of eastern California holds an ancient secret aged beyond that of even the pyramids of Giza and the ancient city of Babylon. The Methuselah tree, hidden in the forests of ...
The path of 14C from cosmic rays to cellulose. Green arrows denote newer pools of 14C and brown arrows denote older pools. The size of the arrow reflects best estimates of size of the carbon pool.
Weather patterns like heat waves or dry spells can sometimes stall over one region. A new University of Arizona study found clues about why. The researchers analyzed tree rings from centuries-old ...
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