NASA’s Mars Global Surveyor spacecraft, which has collected more information about the red planet than all previous missions combined, completes its primary science mission today and begins a new era of continued exploration. “By any conceivable measure the scientific impact of Mars Global Surveyor has been extraordinary. In many ways we now know Mars to be a different planet than when the spacecraft arrived in 1997, and our perspective continues to evolve as the data keep flowing,” said Dr. Arden Albee, Global Surveyor project scientist at the California Institute of Technology in Pasadena. “In some aspects, we now have better maps of Mars than we do of Earth.”