Scientists found new evidence that Earth’s crust is peeling underneath the Sierra Nevada in California. The process might be how the continents formed, they say.

Billions of years ago, Mars was warmer and wetter than today, perhaps because volcanoes belched enough carbon dioxide to ...

In the southern Sierra, the dense rocks had the strongest inherent stripes and were shown to have already sheared away from the crust, whereas in the central region this process appears to be ongoing.