According to the giant-impact hypothesis, the Moon was created during a collision between Earth and a large object about the size of Mars.
根据“巨型撞击假说”,月球是在地球和一个火星大小的物体相撞时形成的。
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The thinking has been that as tyrannosaurs developed to a truly giantsize, they needed to modify their entire skeleton so they could function as predators.
Researchers believe that our moon was created when a giant object the size of Mars hit the early Earth, sending out a disc of debris orbiting our planet.