The ancient water could host ancient life and could be a sign that Mars, too, could host ancient water and life.
Earth's global thaw has reached Mount Everest, the world's tallest peak.
A meeting of Arctic nations is attracting international
attention. But how will countries respond to changes in the region?
All you have to do is walk in the right stinky right place.
Trackways in Brazil have lasted more than 100 million years.
Extremes of fire and ice ravaged homes on different ends of North America recently.
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