Discover how scientists have used iron isotopes to determine the likely origin of the Mars-sized planet named Theia.

Learn more about volcanic activity on Mars and how it may have once provided vital elements to the atmosphere.

By measuring iron isotopes in Moon rocks and meteorites, researchers determined Theia probably formed closer to the Sun than Earth did, not in the distant outer Solar System. Identical twins: Earth ...

The recent announcement that scientists have spotted what they believe to be evidence suggesting ancient life on Mars seemed like the latest in an endless cycle of tantalizing hints followed by pleas ...

Skylights, openings in the surface of Mars that descend down into caves, have been found on Mars, along with signatures for ...

Earth and the planetary object that gave rise to the Moon were likely born in the same region of the solar system.

July 23 (UPI) --Planned moon and Mars missions require timely communications and navigation systems, which is prompting NASA officials to request ideas via proposals from U.S. firms. NASA on July 7 ...

Hope probe captured high-resolution image of Mars' moon Deimos. The spacecraft flew "as close as 100km (62 miles)" from the ...

The new AI tool could help astronauts diagnose and treat medical issues when far from Earth and beyond the reach of doctors. NASA and Google are collaborating to test an AI-powered medical assistant ...