Huge tunnels under southern Brazil and northern Argentina were potentially made by giant, Ice Age sloths for refuge and rest ...

Fresh simulations show there is a chance Uranus and Neptune might actually be rock-rich worlds wrapped in thinner icy layers.

Our fundamental understanding of Neptune and Uranus may be completely wrong, say researchers rethinking our solar system.

New models suggest Uranus and Neptune may hold far more rock than expected, raising questions about how these distant planets formed.

Iceland is a country in a constant state of transformation, reshaped by ongoing volcanic eruptions, erosion, and shifting ice ...

Discover giant ice formations and beautiful rock overhangs on this Ohio hike that’s even better in the winter. If you’re looking for the ultimate winter hike in Hocking Hills, look no further than Ash ...

The National Park Service said ice caves or curtains are starting to form, thanks to recent cold weather. Here's where to see ...

Ice caves, as unique components of the cryosphere, offer invaluable archives of past and present climate conditions. Their perennial ice deposits and distinct internal dynamics provide insights into ...

Researchers analyzing data from multiple Mars missions say they’ve found evidence of karstic caves — enormous underground voids carved when slightly acidic water dissolves rock — in the northern ...

The last two decades have seen a revolution in scientists' ability to reconstruct the past. This has been made possible ...