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272 pages, Hardcover
First published March 12, 2015
Like all the rocky objects in the Solar System, Venus displays thousands of craters, and the majority of them are still in excellent condition. This suggests that there has been minimal erosion of surface detail. More interestingly, it implies that the surface underwent some kind of global restructuring event around 600 million years ago...In a global event that lasted perhaps up to 100 million years, the entire crust weakened and yielded to the mantle, in effect recycling itself.