Volunteers planted 75 redwood tree saplings at the Thomas Redwoods Grove at the Presidio on Friday, Dec. 14, 2018. The saplings were cloned by the Archangel Ancient Tree Archive from ancient coast redwood specimens — some nearly 3,000 years in age and up to 35-feet in diameter.

Volunteers plant redwood saplings in a grove at the Presidio on Friday, Dec. 14, 2018. The saplings were cloned by Archangel Ancient Tree Archive from ancient coast redwood specimens to form part of a larger redwood grove. (Kevin N. Hume/S.F. Examiner)
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