The Moon's formation in the Hadean Eon, details of the Earth-Moon collision, and the geological time divisions.
The Moon was formed approximately 70 million years after Earth due to a collision with a Mars-sized asteroid, resulting in material from both Earth and the asteroid forming the Moon.
The Eon during which the Moon formed is the Hadean, characterized by intense bombardment and the Earth-Moon collision.
Geological time divisions include the Hadean, Archean, Proterozoic, and Phanerozoic, with life appearing over 3.8 billion years ago in simple forms.
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