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sea ice around Antarctica

The extent of sea ice around Antarctica hit a new low in January, bucking an overall growing trend since recordkeeping began in 1979.

The Western Ghats hills at Matheran in Maharashtra, India

Dual magma plumes contributed to mega-sized volcanism around the time of the dinosaur die-off 66 million years ago, a new study suggests. The remnants of this volcanic activity, known as the Deccan Traps, are in what is now India.

Banded iron

OXYGEN’S ORIGINS  The rise of oxygen in Earth’s atmosphere and oceans, known as the Great Oxidation Event, began around 100 million years earlier than previously thought, new research suggests. The oxygen’s presence left a mark in the geologic record, such as this 2.1-billion-year-old banded iron formation.

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