Although California’s five-year drought has come to an end, how has it affected the state’s giant sequoia trees? In this video, we meet a scientist who is seeking to understand these seemingly indestructible giants. Although though the skies have finally opened and the rains have started to fall on California, more than 100 million trees died during the state’s historic five-year drought. Such a monumental loss of trees — trees are amongst the best, most consistent “living sponges” that sequester CO2 from the Earth’s atmosphere — accelerates global warming.