Title: How Much Longer Can Earth Support Life? | Live Science
Headings: How Much Longer Can Earth Support Life?
How Much Longer Can Earth Support Life?
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Content: They calculated that Earth's habitable-zone lifetime is as long as 7.79 billion years. ( Earth is estimated to be about 4.5 billion years old.) Meanwhile, the other planets had habitable-zone lifetimes ranging from 1 billion years to 54.72 billion years. "If we ever needed to move to another planet, Mars is probably our best bet," Rushby said in a statement. " It's very close and will remain in the habitable zone until the end of the sun's lifetime — 6 billion years from now." While other models have been developed for Earth, they are not suitable for other planets, he added. Follow us @livescience, Facebook or Google+. Original article published on LiveScience.