Researchers who have spent nearly four months simulating what it's like to live on Mars are emerging from their experiment on a barren Hawaii lava field Tuesday.
NASA satellites capture Typhoon Utor
Lightning sparks wildfires in Washington, Idaho
Can rocks restore the climate?
When we compare seasons, we always remember the last few years. How exactly has this summer been shaping up, and what's in store for the rest of August?
The Yellowstone volcano in Wyoming, USA is North America's largest volcano system? It is often referred to as a "supervolcano" because it has spewed more than 1,000 cubic km of ash and lava in a single event. The most recent of these massive blasts occurred some 640,000 years ago.
Royston, British Columbia
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