SANTA CRUZ, CA–A new study suggests that ancient features on the surface of Mars called valley networks were carved by recurrent floods during a long period when the martian climate may have been much ...

Yosemite looked very different one hundred million years ago. Towering volcanoes existed here then making up a vast mountain chain similar to the modern Andes Mountains in South America. Deep beneath ...

Tenaya Canyon and part of Yosemite Valley as seen from Glacier Point in Yosemite National Park. Tenaya Creek likely started to scour this granite canyon below Half Dome about 5 to 10 million years ago ...

Earth's valleys tell an ancient story of ice and power. Over millions of years, massive glaciers have carved, sculpted, and transformed the landscape in ways that still take researchers' breath away.

Massive floods from overflowing and rupturing lakes carved deep chasms into the face of Mars during its ancient history, according to new research. The research, led by scientists at the University of ...