State of the Planet

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Key Ocean Current Contains a Warning on Climate

A new study shows that a giant current circling Antarctica has speeded up during past warm periods, eating away at the polar ice. It’s doing it again now.

Scientists extracted a 5.3 million-year record of the Antarctic Circumpolar Current by drilling sediment cores in the Earth's most remote waters. Here, the drill ship JOIDES Resolution making its way through the far southwest Pacific.

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