How was the moon really created?

Reports put new spin on story of moon's creation - "Scientists may never know exactly how the moon and Earth were formed some 4.5 billion years ago, but this week their understanding of the cataclysmic event made a significant leap forward.

In a slew of studies published Wednesday, planetary scientists provided new evidence supporting the long-standing — but imperfect — theory that the Earth and moon formed after the proto-Earth collided with another huge planetary body, sometimes referred to as Theia."