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Red Planet renaissance

Recent discoveries paint Mars as an active planet with erupting volcanoes and underground rivers.
The one constant in life is change. Few human endeavors support this adage better than does science, where new observations and theories continually force scientists to modify their thinking. Yet despite this seemingly constant change, rarely does our knowledge of a subject come full circle. That's precisely what makes the latest findings about Mars so extraordinary. Just five years ago, astronomers viewed the Red Planet as an old, essentially dead world. Recent discoveries made by the Mars Glob...

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