NASA to Launch Two More Helicopters to Mars - VOA Learning English

NASA is launching two more small helicopters to Mars as part of its effort to return Martian rocks and soil samples to Earth. Under the plan announced in late July, NASA’s Perseverance rover will transport soil samples to a rocket.

NASA is launching two more small helicopters to Mars as part of its effort to return Martian rocks and soil samples to Earth. Under the plan announced in late July, NASAs Perseverance rover will tra… [+2605 chars]

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