Curiosity is the most advanced spacecraft built to reach Mars.
Weighting more than a ton, it will be launched tomorrow on Saturday, November the 26th, 2011, placed on the top of an Atlas V launcher in Cape Canaveral in Florida.
The link here below allow you to access to the NASA website that displays its launch.
Pictures displayed here show the Atlas V and the spacecraft in preparation.
The 3rd picture shows the Rover MSL close to the previous robots that have been sent to Mars: differences are very important as you can see!
Credits : NASA/JPL