Mars was once 'Earth-like' with rivers and 4km waterfalls says professor Brian Cox

Mars was once 'Earth-like' with rivers and 4km waterfalls says professor Brian Cox

mirror.co.uk - Rhian Lubin

Mars may now be a dead, ­desolate rock but it was once very much alive and almost Earth-like. Rivers flowed over its surface and waterfalls cascaded …

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