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Welcome to Windows to the Universe - your portal to discovery! Explore the wealth of information available here to learn about the Earth and Space sciences and related topics in the humanities including mythology, art, poetry, and more.
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The Cambrian period, at the beginning of the Paleozoic, was the first time that multicellular life forms flourished on Earth. By the end of the Paleozoic, and beginning of the Mesozoic, all the continents ...Read more