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Will Nasa uncover secrets of Mars?

The US space agency, Nasa, sends its latest spacecraft, Maven, to Mars in an to attempt to find out more about the Red Planet's atmosphere

The US space agency Nasa has launched its latest mission to Mars by sending a spacecraft, Maven, to orbit the red planet for a year.

The goal is to find out how the planet changed from being warm and wet, to its current cold, dry state.

Pallab Ghosh reports.