LOS ANGELES - A report from the National Park Service said wildfires in the US state of California in the past 15 months killed or severely wounded thousands of mature giant sequoias, which led to a two-year death toll about a fifth of Earth's largest trees. Two fires in the Sequoia National Park and surrounding Sequoia National Forest this September, both ignited by lighting, tore through more than a third of groves in California and torched an estimated 2,261 to 3,637 sequoias, between...

LOS ANGELES - A report from the National Park Service said wildfires in the US state of California in the past 15 months killed or severely wounded thousands of mature giant sequoias, which led to a two-year death toll about a fifth of Earth's largest trees. Two fires in the Sequoia National Park and surrounding Sequoia National Forest this September, both ignited by lighting, tore through more than a third of groves in California and torched an estimated 2,261 to 3,637 sequoias, between...