Scientists found new evidence that Earth’s crust is peeling underneath the Sierra Nevada in California. The process might be ...

New research finds that despite large rivers and seas of liquid methane, Saturn’s moon Titan seems mostly devoid of river deltas, raising new questions about the surface dynamics on this alien world.

Iran's folded rocks are a colorful formation that is part of the Greater Caucasus mountains, which formed when the Eurasian tectonic plate collided with the Arabian plate millions of years ago.