In brief: Saturn's largest moon, Titan, is a promising candidate for extraterrestrial life. NASA may be sending a "Dragonfly" drone to explore Titan's surface. With its vast oceans and methane-filled ...

NASA's eight-rotor Dragonfly drone just finished a crucial test, which confirmed the spacecraft's design and will allow the project to move forward with full-scale fabrication of the spacecraft, ...

Add Yahoo as a preferred source to see more of our stories on Google. From underwater object clusters to police helicopter encounters, mysterious sightings grip the nation It was the year of the UFO ...