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1. 1. When The Earth Had Two Moons

   The Moon's Formation and Evolution

   

   This book explores the provocative idea that early Earth briefly hosted a second, smaller moon formed from the debris of the giant impact that made our Moon, and shows how tidal dynamics, collisions and mergers among multiple moonlets could explain lunar asymmetries, basins and volcanic maria; combining planetary geology, computer simulations and observational evidence, it traces how such chaotic early events shaped the Moon’s surface, influenced Earth’s tides and habitability, and altered the trajectory of planetary evolution in the young solar system.

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