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Nasa to send new rover to Mars in 2020

5 December 2012 Last updated at 07:18 GMT

The US space agency (Nasa) says it will launch a new rover to Mars in 2020.

The vehicle will be based on its Curiosity robot, which landed on the Red Planet in August.

It is hoped that the robots will pave the way for a manned mission to Mars.

The BBC's Jonathan Amos reports.