By CBC Radio
When David Milarch first learned about ancient coast redwood stumps hidden in California, he says he was "the most thunderstruck" he'd ever been. At about 10 metres in diameter, he'd never heard of any tree growing that big. Now the non-profit that Milarch co-founded is using genetic information from five massive tree stumps to help in the fight against climate change.
On Dec. 14, the Archangel Ancient Tree Archive planted 75 coast redwood saplings at Presidio, a park in San Francisco, that are exact clones of those stumps.