Oyster farmers have been hit hard by acidifying seas. Can they adapt?
Dry conditions lead trees to release pheromones that attract bark beetles, exacerbating an epidemic of dying forests in the state of California.
Homo sapiens worldwide may have descended from a single migration event out of Africa more than 50,000 years ago.
With an eye on New York City, an epidemiologist looks at how many deaths extreme heat could cause, and how we can prevent them.