How many other inhabited planets are there? It's a question that fascinates scientists and lay people alike. A new equation may abet weigh up the possibilityMany of us maintain glanced upwards at the stars and wondered whether there is other life out there somewhere. Few,however, maintain then tried to write down an equation to express the probability in numbers.
Sara Seager of the Massachusetts Institute of Technology has done just that. Her equation collects together all the factors that could determine how many planets with detectable signs of life may be discovered in the coming years.
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Source: theguardian.com