Space.com on MSN
Earth and Theia smashed to birth the moon, but did they first start out as close neighbors?
"The most convincing scenario is that most of the building blocks of Earth and Theia originated in the inner solar system.
New research suggests that Theia, the object whose collision with Earth is theorized to have caused the formation of the moon ...
Discover Magazine on MSN
Earth and the Mysterious Planet Theia Were Likely Close Neighbors Before the Moon Formed
Discover how scientists have used iron isotopes to determine the likely origin of the Mars-sized planet named Theia.
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