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Heat emanating from Mars’s still active interior was insulated by the carbon dioxide ice, warming up the water ice causing about half of it to melt and flow across the Red Planet’s ancient surface.

Written by the former chief historian of NASA, the book examines the evolution of our cosmic understanding—from early civilizations to the present day ...

After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

On a cold, ancient Mars, rivers flowed and a lake the size of the Mediterranean Sea swelled under the protection of thick ice ...

“To find evidence of an ocean inside a small object like Miranda is incredibly surprising,” said Tom Nordheim, a planetary ...

Surface features of Uranus' icy moon Miranda point to the existence of a once deep ocean, one that still may exist today.

This model reveals how vastly different the atmosphere was on ancient Earth, and how life may have first emerged.

Could a moon that orbits Uranus billions of miles away have an interior ocean? This is what a recent study published in The Planetary Science Journal hopes | Space ...

The key to unlocking the secrets of distant planets starts right here on Earth. Researchers at Tohoku University, the ...

The European Space Agency’s Hera mission is the first to send a spacecraft and two CubeSats to an asteroid in deep space.