History in the stump

History in the stump an international team looked at the seasonal growth rings in 28 specimens of 500 centuries old Fitzroya cupressoides , a conifer found in South America to trace a picture of the world's climate 50,000 years ago.

The scientists were able to study the trees as a result of two natural disasters. The first covered up and preserved the trees around 500 centuries ago. The second, in 1960, began to bring the trees back to the surface. They found what seems to be early evidence of El Ni

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