NASA Mars Rover Has a 'Pet Rock' in Its Wheel That Refuses to Leave - CNET

After months of adventure, the rock is still along for the ride with Perseverance.

This story is part of Welcome to Mars, our series exploring the red planet. It's hard for me to pick a favorite rock on Mars. There's the "butt crack" and the "flower" and, of course, the stunning … [+1693 chars]

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