Plasma jet engines promise a future of fuel-free, electrically driven flight, but the technology faces a stubborn obstacle ...

Russian scientists say they are closing in on a propulsion breakthrough that could compress the journey from Earth to Mars from roughly 300 days to about one month. The project centers on a high power ...

Here’s what you’ll learn when you read this story: While chemical rockets penned the opening pages of the story of human spaceflight, countries around the world are eager to start a new chapter: ...