A technician looks at NASA's Mars Science Laboratory rover 'Curiosity', where it is undergoing pre-flight tests in the 'clean room', at the spacecraft assembly facility at the Jet Propulsion Laboratory in Pasadena, California. The Mars Science Laboratory rover, about the size of a Mini-Cooper automobile, is due to be launched on its mission to Mars late 2011, arriving on Mars in August 2012
Picture: REUTERS / NASA