Climate change has damaged reefs around the world, with rising sea temperatures and increased ocean acidification. Can science help reefs recover?
You thought Yosemite's Dawn Wall looked tough? See photos of 11 of the world's hardest, most influential free climbing achievements.
Tommy Caldwell free climbed the 3,000-foot Dawn Wall, waiting for less experienced climbing partner Kevin Jorgeson to catch up, so they could make history together.
A Seattle dog learned to hop the bus to the dog park, and she's not the only furry rider on public transit.
World’s largest natural gas producer aims to cut emissions of potent greenhouse gas from oil and gas sites
The answer to the age-old question may come down to temperature, suggests a study that finds more stripes on zebras in warmer places.
Tommy Caldwell and Kevin Jorgeson are the first to free climb the Dawn Wall.