Water Lust: Why All the Excitement When H2O Is Found in Space?

When NASA announced last month the finding of water ice in several impact craters on Mars , and either water or hydroxyl widely dispersed on the moon 's surface, the solar system became a little more familiar because it seemed a tad more hospitable to life as we know it on Earth. But is that because the rest of the cosmos has much in common with Earth or vice versa?

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