Surface of Mars in photo sent by Phoenix explorer of NASA

This color image released by NASA and acquired by NASA's Phoenix Mars Lander's Surface Stereo Imager on Friday, June 13, 2008, shows one trench informally called "Dodo-Goldilocks" after two digs on June 12, by Phoenix's Robotic Arm.

Shallow trenches excavated by the lander's backhoe-like robotic arm have turned up specks and at times even stripes of mysterious white material mixed in with the clumpy, reddish dirt.