Ancient Zircon Reveals Age of Earth’s Crust

Image by sdixclifford (Flickr)

Image by sdixclifford (Flickr)

A tiny sliver of ancient zircon reveals the crust of our planet formed at least 4.4 billion years ago—160 million years after the birth of the solar system, according to a new study.

Earth itself is believed to be about 4.5 billion years old.

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