Mars: Uncovering the Secrets of the Red Planet - Paul Raeburn

Mars is the most similar of all the planets in the Solar System to our home, the Earth. Mars has seasons, a 24 hour day, polar caps, and evidence of ancient seas. There are clouds on Mars, and it snows occasionally, too. Although the atmosphere is too cold and thin for liquid water to remain on the surface, the river valleys which are so evident across the planet means that water must have flowed here millions of years ago when Mars was warmer. There is then, a chance that life arose during the billion years or so that Mars was more hospitable than today; perhaps life still clings on, deep underground, as algae or bacteria, or perhaps something even more ...  Read the complete review