NASA/JPL-Caltech/ASU
- NASA's Perseverance Mars rover is collecting samples that could be evidence of ancient alien life.
- But NASA's Mars Sample Return mission to bring them to Earth will now cost $11 billion and take two decades.
- NASA is scrapping that plan now and asking companies for a better idea.
NASA bit off more than it could chew when it sent the Perseverance rover to Mars to collect samples.