How to Bring Mars Sample Tubes Safely to Earth (Mars News Report)

NASA's Perseverance Mars rover is filling sample tubes with rocky material on the Red Planet as the agency works on the next steps to get them safely back to Earth.
The Mars Sample Return campaign would bring samples collected by the Perseverance rover to Earth for detailed study. The campaign involves an international interplanetary relay
team, including the European Space Agency (ESA). These samples could answer a key question: did life ever exist on Mars?