Without new landers or rovers, it's helicopters or bust for NASA's Mars program
NASA's cost estimate for SR-1 Freedom is $2.1 billion, but that doesn't include the helicopters.
What happened?
NASA's cost estimate for SR-1 Freedom is $2.1 billion, but that doesn't include the helicopters.
Story details
NASA's cost estimate for SR-1 Freedom is $2.1 billion, but that doesn't include the helicopters.
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