NASA says its plan to bring Mars samples back to Earth is safe, but some people are worried - Phys.org

Since September, the Perseverance rover has been picking along an ancient river delta on Mars, its robotic arms reaching out with whirling steel drill bits to core rocks, scoop soil and suck small amounts of the red planet's atmosphere into titanium tubes.

Since September, the Perseverance rover has been picking along an ancient river delta on Mars, its robotic arms reaching out with whirling steel drill bits to core rocks, scoop soil and suck small am… [+7834 chars]

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