(Space) One of Earth's oldest rocks may have been dug up on the moon.
A chunk of material brought back from the lunar surface by Apollo astronauts in 1971 harbors a tiny piece of Earth, a new study suggests. The Earth fragment was likely blasted off our planet by a powerful impact about 4 billion years ago, according to the new research.
"It is an extraordinary find that helps paint a better picture of early Earth and the bombardment that modified our planet during the dawn of life," study co-author David Kring, a Universities Space Research Association (USRA) scientist at the Lunar and Planetary Institute in Houston, said in a statement. (Biologists generally believe that life got a foothold on Earth between 4.1 billion and 3.8 billion years ago.)
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