http://blogs.discovermagazine.com/d-brief/?p=32441
Our solar system is a chaotic place – literally. Rewinding orbital possibilities quickly becomes too complex and too numerous for astronomers to calculate. That means we only know the orbital movements of Earth and the other planets over the past 60 million years or so. To look further back, scientists are pulling core samples from deep under Earth’s surface to examine long-ago climate change and learn about how the planets moved hundreds of millions of years ago.
Scientists used two core
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March 5, 2019 at 05:54PM