Tree physiologist Tom Kimmerer shows a lightning rod installed as part of a conservation plan he developed for the Schoolhouse Oak, which he thinks is between 400 and 500 years old. Ball Homes hired Kimmerer to develop a plan for protecting the tree as an icon for the subdivision it is building at Military Pike and Harrodsburg Road. Kimmerer said the tree shows evidence of being struck by lighting several times over the centuries, but remains healthy and could live for hundreds more years if properly cared for. Photo by Tom Eblen | teblen@herald-leader.com

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