Planet Earth. Photo: NASA As we encounter all the successes and setback to environmental sustainability on our planet, there are those keeping up the mission to figure out what makes Earth habitable to begin with and whether life exists elsewhere in the universe. James Kasting, a geoscience professor at Penn State University and arguably the world’s leader in the study of habitable planets, offered some insights at the California Academy of Sciences in San Francisco on Wednesday. His new... [Read more]