Group clones California giant trees to combat climate change
Wednesday, July 20, 2016 - 02:01
in Earth & Climate
CAMP NELSON, Calif. (AP) -- At the foot of a giant sequoia in California's Sierra Nevada, two arborists stepped into harnesses then inched up ropes more than 20 stories into the dizzying canopy of a tree that survived thousands of years, enduring drought, wildfire and disease....