How Mars rovers could explore vast uncharted caves
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Ever since scientists have had an orbiter's view of Mars, they've observed intriguing black spots on the surface so dark no one knows what's inside them. They're thought to be the mouths of deep caves where the sun doesn't shine, formed by ancient volcano vents. Within them could be existing Martian life, liquid water, or traces of long-dead bacteria or fungi that flourished eons ago. With NASA's new moon-to-Mars Artemis space campaign, researchers are intent on developing technology to make...

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