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Earth isn’t one planet.
It’s two, according to a study from UCLA published in “Science.”
As the study contends, a “planetary embryo” named Theia collided with the early Earth and split evenly into two parts: one subsumed by the Earth, and another that became the Earth’s moon.
Scientists already knew about Earth and Theia’s collision, but they thought it was a “glancing side blow.” This new research suggests that the crash was much more violent.
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© NASA via Getty Images In this handout provided by the National Aeronautics and Space Administration, Earth as seen from a distance of one million miles by a NASA scientific camera aboard the Deep Space Climate Observatory spacecraft on July 6….
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James' World 2 
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