At the top of the world, there is a sea—the remains of one, at least. The summit rocks of Mount Everest, the highest ...

A new study suggests glaciers carved metals out from the Earth’s surface 700 million years ago, leading to chemical reactions ...

The End-Permian mass extinction killed an estimated 80% of life on Earth, but new research suggests that plants might have ...

About 700 million years ago, massive glaciers crept across the Earth’s surface toward an ice-covered sea, scraping the ground ...

Kirkland and his colleagues found answers in Scotland and Northern Ireland, where they studied sediments from rock formations dating to the Neoproterozoic. The team looked at zircons — crystallized ...

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The team looked at zircons — crystallized minerals that are exceptionally durable and can weather extreme geological events. Zircons also contain uranium; by measuring the stages of uranium’s ...

The zircons include radioactive elements — lead and uranium — that gradually decay, which enables researchers to determine how long it has been since the crystals formed.