Fast and furious floods shaped Martian surface

Overflowing lakes sculpted Mars billions of years ago.

A false colour aerial image showing river valleys on Mars
A colored topographical image showing river valleys on Mars. The outlet canyon Loire Vallis (white line) formed from the overflow of a lake in Parana Basin (outlined in white). Black lines indicate other river valleys formed by processes other than lake overflows. Credit: NASA/GSFC/ JPL ASU