EcoWatch: Despite having had a heart transplant three years before, Lonnie Thompson ascended to 22,000 feet and braved -35 degree F temperatures on a mountain peak in far western China in 2015 to do his job as an ice-core paleoclimatologist. The renowned professor from the Ohio State University has extracted and examined ice cores from around the world since 1974. He testified before the U.S. Senate about global warming in 1992, detailing the havoc climate change is wreaking on the planet. The testimony came...