From 9-foot tall ostriches to albatrosses with gargantuan wingspans, here are some of the biggest birds in the world.

The thick, mineral-rich layers of clay found on Mars suggest that the Red Planet harbored potentially life-hosting ...

What if Venus became Earth's moon? Explore how our planet would change if Earth’s twin, a planet almost the same size and ...

Even if Earth does survive, it won’t be pretty. The temperature of our planet will be about 1,300 degrees C, hot enough to ...

Most meteorites that have reached Earth come from the asteroid belt between Mars and Jupiter. But we have 1,000 or so ...

Our planet has been asteroid-smashed, melted and eroded, enough that most of its original armor has been long buried. Except ...

A salty surge in the Southern Ocean is melting Antarctic sea ice from below — and causing dramatic changes scientists didn’t ...

Essentially, gas pistoning is a shallow, degassing-driven rise and fall of a lava surface. Often these pistons occur in ...

The outlook is promising for future long-term monitoring of planets across multiple wavelengths. Infrared imaging data from ...

In the Afar Depression of East Africa, a remarkable geological transformation is unfolding, with scientists revealing that ...

If you’ve been following the ongoing episodic summit eruption of Kīlauea volcano on the Big Island, you might have seen the ...

The landscape is stark, dark and dramatic, formed by a series of eruptions in the last 16,000 years that have stacked layer ...