NASA scrapped its $11 billion scheme to grab Mars rocks that may point to alien life. Now it has a faster, cheaper plan.

NASA scrapped its $11 billion scheme to grab Mars rocks that may point to alien life. Now it has a faster, cheaper plan.

NASA

The Perseverance rover is building up a stash of rocks on Mars that could contain the first-ever signs of alien life, but NASA is scrambling to figure out how it will bring them back to Earth for analysis.

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