This voice experience is generated by AI. Learn more. This voice experience is generated by AI. Learn more. Illustration of the Earth-like exoplanet Proxima Centauri b orbiting the star Proxima ...

Long before Sputnik launched, something else may have already been orbiting Earth. Known as the Black Knight Satellite, this mysterious object has sparked theories of alien observation, ancient ...

An astronaut who developed an unexpected medical issue while living and working on board the International Space Station is back on Earth after prompting a rare medical evacuation in space. NASA ...

Australia is doing absolutely everything to protect its most iconic ecosystem — except, perhaps, the one thing that really matters.

Sign up to receive CFR President Mike Froman’s analysis on the most important foreign policy story of the week, delivered to your inbox every Friday afternoon ...