Congo River

Hibonite

Risk of asteroid hitting Earth higher than thought, study shows

In Mediterranean marble, secrets of the global carbon cycle

Heulandite

Ecology team improves understanding of valley-wide stream chemistry

Researchers find 3-million-year-old landscape beneath Greenland Ice Sheet

Hetaerolite

Krypton used to accurately date ancient Antarctic ice

Today’s Antarctic region once as hot as California, Florida

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