Add Yahoo as a preferred source to see more of our stories on Google. Engineers have designed a compact, battery-powered radio probe that could help unlock the secrets of alien planets. The proposed ...

For decades, scientists have dismissed the idea of reactionless propulsion—the concept of generating thrust without expelling propellant—as a fantasy that defies the laws of physics. But Charles ...

Engineers have designed a compact, battery-powered radio probe that could help unlock the secrets of alien planets. The proposed small probe, known as the Gravity Imaging Radio Observer (GIRO), would ...