The U.S. space agency said Tuesday it wants to launch another rover to Mars modeled after the popular Curiosity now searching for life on the planet. The National Aeronautics and Space Administration (NASA) said the spacecraft will be built from spare parts from Curiosity. It also would use the new landing system that safely delivered the car-sized rover to Mars in August. The new Mars mission is scheduled for 2020 and is estimated to cost about $1.5 billion, but scientists have not decided exactly what the rover would try to accomplish. NASA said the mission would be another step toward eventually sending astronauts to the planet in the 2030s.
