NASA has announced humanity's next big feat of space exploration. In 15 years, the space agency said, scientists may land a nuclear-powered helicopter on the surface of Saturn's icy moon, Titan. The drone-like rotorcraft, nicknamed "Dragonfly," would skim and scan the moon's surface while seeking out signs of past — or present — microbial alien life. According to NASA, Dragonfly will be slated to launch around 2026 and arrive at Titan in 2034. It was one of a dozen $850 million mission concepts that research teams pitched to the space agency in 2017.