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New research on diamonds found deep in the Earth's crust suggests that the planet's carbon cycle reaches far underground.

Charles Q. Choi, Contributor

image shows a round, brown fossil of an ancient organism known as aspidella.

Fossils dating more than about 540 million years old are extremely rare. That's why a newly discovered ancient deposit is so valuable.

Christian Fogerty, Contributor

The new findings come after more than 10 years of observation.

Christian Fogerty, Contributor

Image shows a hand holding a piece of slate with a fossil, with mountains in the background.

New discovery could help scientists unearth more ancient microbial fossils and shed light on some big questions about early life on Earth.

Meredith Fore, Contributor

Ice-buried canyons may have been formed by repeated floods as the world went into an ice age more than 2 million years ago.

Tom Metcalfe, Contributor

A new study suggests a correlation between volcanic activity and heavy rainfall, but other volcanologists are skeptical.

Rebecca Boyle, Contributor

Researchers examined some of the oldest rocks in western Greenland to probe the beginnings of today’s continents.

Ramin Skibba, Contributor

The water contains bacterialike shapes that researchers plan to test for DNA.

Nala Rogers, Staff Writer

Some bubbles grow to be more than a quarter-mile across.

Meeri Kim, Contributor

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