All set to satisfy our curiosity
Mars rover Curiosity was launched on November 26th 2011. It will be on Mars in Aug 2012 (takes about 8.5 months). The Wikipedia says that it will land some time between Aug 6 and Aug 20, 2012, while the countdown on the NASA mission page, gives a precise countdown suggesting Aug 6th as the landing date. As explained in this pdf on their website,
The overarching science goal of the mission is to assess whether the landing area has ever had or still has environmental conditions favorable to microbial life, both its habitability and its preservation.
In brief, we are looking for aliens. Ok, not exactly, but this is a step. But if you think looking for extra-terrestrial life is madness, here is Neil deGrasse Tyson answering a question on an online chat recently.
Question: What do you think will be the biggest scientific breakthrough upcoming in the next 50 years
Neil deGrasse Tyson: Life elsewhere in the solar system. Mars, most likely.
Of course that does not mean intelligent life. If at all we find life, it will, in all probability be only microbes. But that is reason enough to look forward to the landing. Here is the rover.
I’ve heard some folks wondering why NASA is using such a crazy complicated way to land the rover. The reason has to do with the gravity and atmosphere of Mars, as well as the mass of the rover itself. Landing on Mars is difficult. It has just enough gravity to make it hard to land with just rockets; it would take a lot of fuel, and that means you have to lug that all the way there, which in turn means less mass available for the science package. Mars also has air, which means you can use parachutes, but the air is too thin to make it practical to use them all the way down like we do on Earth. So we’re stuck having to use both rockets and parachutes.