Nasa committed to Mars rover plan
By Jonathan Amos Science reporter, BBC News
Nasa is pushing ahead with plans to launch its next Mars mission in 2009, but
acknowledges
that extra funds are required to make it happen.
The Mars Science Laboratory (MSL) will be the biggest planetary rover yet; it
will be the size
of a Mini Cooper.
Engineers are grappling with a number of technical challenges, such as the
complexity of the
motors that will drive the vehicle across the surface.
The budget has already grown to $1.9bn from the original cost of $1.6bn.