Keith Cooper is a freelance science journalist and editor in the United Kingdom, and has a degree in physics and astrophysics from the University of Manchester. He's the author of 'The Contact Paradox: Challenging Our Assumptions in the Search for Extraterrestrial Intelligence' (Bloomsbury Sigma, 2020) and has written articles on astronomy, space, physics and astrobiology for a multitude of magazines and websites.
."It is tempting to assume that a second Earth would be just like ours, but our modeling results suggest that this is not likely to be the case."
The results indicate that Earth's ratio of land to sea is finely balanced and that for most planets, this ratio can easily tip over into mostly land or mostly sea.
"In the engine of Earth's plate tectonics, internal heat drives geologic activity, such as earthquakes, volcanoes and mountain building, and results in the growth of continents," Spohn said. On the other hand,"The land's erosion is part of a series of cycles that exchange water between the and the interior. Our numerical models of how these cycles interact show that present-day Earth may be an exceptional planet."Spohn and Höning also considered other factors, such as how the outgassing of carbon dioxide contributes to the carbon-silicate cycle that acts as a planet's long-term thermostat controlling the climate over millions of years.
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