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The European Southern Observatory (ESO) says they've discovered another earth-like planet and at four light years away, it's the one closest to us, and might just be one that supports alien life. Dr Jay Farihi is an expert on planetary studies at University College London's Physics and Astronomy unit: (Pic: An artist's view of Proxima B orbiting the star Proxima Centauri, the nearest stellar neighbour to our sun Credit: Reuters)