Microbes living in water deposits deep below the Arabian desert may provide clues about whether methane on Mars signals the presence of life.
Earth's water has a mysterious past stretching back to the primordial clouds of gas that birthed the Sun and other stars.
A new study gives hope for the possibility that many super-Earth planets orbiting distant stars have exposed continents rather than just water-covered surfaces.
Google aims to invest billions in a fleet of satellites to provide service to areas presently without broadband Internet access.
A huge asteroid that wiped out the dinosaurs may not have been the only cosmic event to cause mass extinctions or change Earth’s climate.
A hypersonic vehicle that launches like a rocket could fly people from the U.S. to Europe in an hour.
A physicist hopes his science fiction book can help fund a laser-powered EMP defense against guided missiles.
NASA wants to use spooky quantum physics to detect the existence of gravitational waves predicted by Albert Einstein.
A spinning rocket stage could hurl tiny satellites toward other planets like mighty Thor wielding his hammer.
NASA and U.S. military researchers want to make space robots that borrow the best traits of living creatures.
A NASA-backed 3D printing effort could lead to space manufacturing of huge telescopes or spacecraft.
American spaceflight industries and the military are struggling to balance innovation and budget cuts.