A final missing skier was also presumed dead, the authorities said. Six survivors were rescued. The avalanche is the deadliest in modern California history.

Longtime readers may remember a proposal to recreate the experience of standing on the the Moon inside a giant spherical ...

Last week, SpaceX founder Elon Musk advised workers at the newly acquired company xAI that he wants to set up a factory on ...

Debris from the collision could have formed another moon of Saturn called Hyperion, and affected the tilt of Saturn itself.

Scientists have produced the first global map and analysis of small mare ridges (SMRs) on the moon, a characteristic geological feature of tectonic activity. Published in The Planetary Science Journal ...

The United States flew a reactor in space in the 1960s and has studied nuclear thermal propulsion for decades. Fuel is not the primary limitation either; the enriched uranium supply chain is ...

Two groups of scientists have now come forward saying they've found traces of the lost Soviet lander, Luna 9, which launched 60 years ago.

Elon Musk shifts SpaceX’s focus from Mars to building a self-growing city on the moon, citing speed, strategy, and rising competition from China.

You have probably heard the line about the Great Wall being visible from the Moon. It sounds bold, romantic, and completely ...

Jetavanaramaya, a colossal fourth-century Sri Lankan stupa, was once among the world’s largest structures — a vast and ancient brick-built engineering marvel born out of religious rivalry that has ...

Skyler Chan, the 22-year-old CEO of Galactic Resource Utilization Space (GRU), recently announced that he’s taking reservations for a hotel he plans to open on the moon within the next 10 years. He’s ...

Some of these people had likely already watched Honnold scale the 3,000-foot rock wall of Yosemite’s El Capitan. But for many, the climber’s ascent up a man-made structure was likely an introduction ...