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Textbooks say that the moon was formed after a Mars-size mass smashed the young Earth. But new evidence has cast doubt on that story, leaving researchers to dream up new ways to get a giant rock into orbit.
Join David Kaplan on a virtual-reality tour showing how the sun, the Earth and the other planets came to be.
A mission to collect samples from the far side of the moon could answer questions about a barrage of asteroids nearly 4 billion years ago.
Geochemical signals from deep inside Earth are beginning to shed light on the planet’s first 50 million years, a formative period long viewed as inaccessible to science.
By blasting a stack of minerals with a four-meter-long gun, scientists have found a new clue about the backstory of a very strange rock.
Did the minerals on our planet arise in a predictable fashion, or did they result from chance events? The answers could eventually help scientists identify planets likely to harbor life.
When scientists traced a museum rock back to its origins, they uncovered mysteries about the early solar system.