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Earth 2.0: Is Nasa about to discover alien life?

Cynics might raise an eyebrow at reports of a new "Earth-like" planet—but this story is worth watching

By Philip Ball  

Scientists using data from NASA's Kepler mission have confirmed the first near-Earth-size planet orbiting in the habitable zone of a sun-like star. © NASA via ABACAPRESS.COM

Read more:  The Pluto mission marks the start of a new age of space exploration

How should we think about the discovery of what appears to be an Earth-like planet orbiting another star? Cynics might say “What, again?”—for there have…

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