Nasa rover trundles on past its use-by date and brings exciting news for scientists, says Simon Redfern. After almost a decade of exploring the surface of Mars, Nasa's rover has found the strongest evidence yet for the presence of water on the red planet. The data comes from "Esperance", one of the oldest rocks studied on Mars. The clays inside the rock point to the presence of abundant water early in Mars' history. To obtain this data the American space agency's rover...
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