"NASA's Nuclear Rocket Engine Propels Mission to Mars"
NASA is partnering with DARPA to develop a rocket that uses nuclear propulsion to carry astronauts to deep-space destinations like Mars. Nuclear rocket engines could significantly cut down on the time needed to reach Mars, making long-duration spaceflights less risky for the humans onboard. DARPA is developing a rocket powered by nuclear thermal propulsion, which is at least three times as efficient as chemical rockets. The first DRACO demonstration could happen as early as 2027, according to NASA.