The Curiosity Rover on Mars, is the newest in a long line of missions to Mars: landers sent to exposé its soil and study its rocks, orbiters sent to map its landscapes. All this was done to find the answer to the same question. Did liquid water once existed on this dry and dusty world? Did it support life in any form? And are there remnants left to find? And so far, based on current data, researchers are quite sure that Mars once was a habitable planet. So the question is why Mars died, and Earth lived?
Learn more about this in the video below: