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The most amazing thing so far that we've seen from Curiosity is that just within a few hours of landing, it has sent us images from the surface of Mars. Bear in mind this vehicle travelled 36 weeks to reach it's destination and those images are in fact coming from the other side of the Sun.
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It has begun it's two year investigation on Mars and will do this with the aid of 10 science instruments and even a laser, all powered by nuclear energy. Overall cost of the mission came in at just over $3 billion. Let's hope all goes well.