Scientists have made a groundbreaking discovery that challenges our understanding of Earth's water cycle. A massive ...

In a $19.5 million NASA-funded mission, a team at George Mason University is heading a project to construct and launch a ...

The Polaris Dawn astronauts exposed themselves to the void of space while 435 miles above Earth. Rewatch the moment here.

The Expanse, a series that has taken the sci-fi ... Whether she's dealing with Earth's politics, Martian power plays, or ...

Until now, walking into the empty expanse of space has only been attempted by government astronauts on the International Space Station (ISS), 250 miles (400 km) above Earth. Polaris Daw crew ...

A Mars scientist shares the inside story of the NASA Curiosity rover's poignant first photo of Earth and Mars moon Phobos ...

An epic exploration of human history examines how the poor and powerless have fought back — time and again — against those ...

Plus Adrian Tchaikovsky’s ‘Service Model.’ ...

Jared Isaacman became the first civilian to conduct a private spacewalk, after traveling farther from Earth than any human in over 50 years.

Astronomers from the Nicolaus Copernicus University in Torun have discovered a new planet in the constellation of the Great Bear. It has a mass as much as 11 times that of Jupiter, orbits its star ...

A new study concludes that world's whitest sands grace Tulum Beach, an immaculate six-mile expanse in Mexico's Riviera Maya.