New theory of how Mars was shaped.

From: USA Today (Magazine) | Date: June 1, 1994 | Copyright information

Geophysicist Norman H. Sleep theorizes that plate tectonics have shaped the surface of the planet Mars as well as the surface of the earth. The tectonic theory would account for the lowland that covers the northern third of Mars.

The rugged face of Mars may have been shaped by plate tectonics, the same geological process that is responsible for earthquakes, ocean basins and continental drift on Earth, according to Norman H. Sleep, professor of geophysics, Stanford University. Thi...

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