Lead Rover Driver and Mobility Systems Engineer Matt Heverly uses an Apple iPhone app to control the Scarecrow Mars Rover (rear), which is an engineering model of NASA's Curiosity Mars rover created with less weight than the actual model to compensate for the difference in Mars' gravitational pull, in a sandy, Mars-like environment named the Mars Yard at NASA's Jet Propulsion Laboratory in Pasadena, California July 25, 2012. The real Curiosity rover, part of the Mars Science Laboratory mission, is on its way to the Red Planet, with a planned arrival and landing on the evening of August 5 PDT, early morning August 6 EDT. REUTERS/Danny Moloshok (UNITED STATES - Tags: SCIENCE TECHNOLOGY SOCIETY)  Lead Rover Driver and Mobility Systems Engineer Matt Heverly uses an Apple iPhone app to control the Scarecrow Mars Rover, which is an engineering model of NASA's Curiosity Mars rover created with less weight than the actual model to compensate for the dif
{}