Created by the solar wind — a stream of charged particles constantly pouring out from the sun — the heliosphere acts as a ...

Lunar rocks collected by Apollo astronauts more than half a century ago are providing a fresh take on the moon's mysterious ...

Social media videos showed people running into the streets as bright orange flames and smoke spewed into the sky.

The avalanche that killed nine people near Lake Tahoe raises questions about just how safe the fast-growing adventure tourism ...

One thing that makes the Lassen Peak Trail special is its accessibility within the context of Lassen Volcanic National Park.

The recent avalanche that killed nine people in California raises questions about just how safe the fast-growing adventure ...

Volcanoes and wildfires can inject millions of tons of gases and aerosol particles into the air, affecting temperatures on a global scale. But picking out the specific impact of individual events ...

When we think of ice on Mars, we typically think of the poles, where we can see it visibly through probes and even ground-based telescopes. But the poles are hard to access, and even more so given the ...

Taftan volcano in southeastern Iran rose 3.5 inches over 10 months, signaling that it is waking up after 700,000 years of dormancy.

A restarted black hole in J1007+3540 reveals how episodic jet activity and cluster pressure sculpt giant radio galaxies. Astronomers have captured one of the clearest views yet of a black hole ...

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