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No matter how many missions to Mars she takes part in, the sheer joy of unearthing discoveries about the Red Planet never ...

The moon may still be geologically active, judging from the way the lunar far side is wrinkling as the moon contracts. At ...

The acid yellow moon Io that orbits Jupiter may be less than 30% the size of Earth, but is considered the most volcanic body ...

Yellowstone's geothermal wonders hide an active volcanic system. Recent studies suggest the northeastern magma body could ...