The further back into Earth’s history your mind wanders, the more work your imagination has to put in. That’s even more true for Mars. None of us have physically stepped foot on the present-day ...

A climate similar to that of Earth’s deserts, with intermittent floods and long dry spells, reproduces the valley networks (image C, above). Another scenario, with intense deluges over a short period ...

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 ...

Mars’s southern highlands are covered in vast networks of valleys that are thought to have been created by running water long ago. But a new analysis suggests they may actually have been carved out by ...

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 ...

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 ...