NASA officials have announced that they have no plan to return to Earth samples of Martian rocks that could contain signs of life.The agency's Perseverance rover has been exploring the surface of the Red Planet for more than three years, collecting rock and soil samples to provide evidence of life. By all accounts, Perseverance was successful in its mission to collect samples – but bringing those samples home is a different story. A recent report showed that NASA's original plan to return the... Read this story