1.75 Billion Years Left For Life On Earth?

Some scientists at the University of East Anglia think the expanding Sun will make Earth unlivable within 1.75 billion years or maybe 3.25 billion years. Andrew Rushby, one of those scientists, suggests a move to Mars. But there''s a better idea: Make Earth's orbit gradually get bigger. Don Korycansky, Gregory Laughlin, and Fred Adams proposed using 1 million passes of an asteroid Near Earth to tug on its orbit and by the planet another 5 billion years. It just so happens Earth's orbit around the sun is already increasing. A few billion years ought to be enough time to turn Mars into an interplanetary ship that can hold a large civilization inside of it. Can we move Mars to a...

Source: FuturePundit - September 23, 2013 Category: Health Medicine and Bioethics Commentators Authors: Randall Parker Source Type: blogs