NASA is launching its $2.4 billion Perseverance Mars rover on Thursday. The nuclear-powered robot will test technologies astronauts need on the red planet.

· NASA is about to send its next rover to Mars: a nuclear-powered robot called Perseverance.
· Perseverance is expected to record the first high-quality video and audio of Mars, drill rock samples that could contain signs of alien life, and deploy the first interplanetary helicopter.
· Here's how NASA's newest Mars rover...