- The Washington Times - Friday, February 20, 2004

LOS ANGELES (AP) — NASA scientists got another look beneath the surface of Mars after the rover Spirit dug a trench in the Martian soil yesterday, while its twin, Opportunity, prepared to examine a rock dubbed “El Capitan.”

The upper few inches of the Martian soil were being studied by instruments on each rover’s arm for evidence of water, which would suggest the dusty, frigid Red Planet could have been hospitable to life at one time.

Spirit, working in a crater, used one of its six wheels to create a trench 2.8 inches to 3.1 inches deep. Spirit had to work twice as long as Opportunity did earlier, when it dug down 3.5-3.9 inches into loose sand on the other side of the planet.

“The soil at [Spirits] location was apparently firmer than at Opportunity’s site,” said Jim Erickson, mission manager for Opportunity, during a teleconference from the National Aeronautics and Space Administration’s Jet Propulsion Laboratory in Pasadena.

Spirit was to use its instruments to study the wall and bottom of the trench for two days.

Data from Opportunity’s trench showed that the soil in the walls was different from that on the surface. Scientists said that sand grains in the wall appeared to be cemented together.

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