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Earth & Environment

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narwhals

FREEZE AND FLEE  Narwhals, mammals known as “unicorns of the sea” for their single tusk, have another oddity: Their hearts slow to near-arrest during frantic flights into the deep.

blue whale

ROLLING IN THE DEEP  Most blue whales roll to their right side when hunting in deep water. But in shallow zones, the animals roll left instead, a new study finds.

ocean water samples

DEEP FIXERS  Scientists collected ocean water at different depths using this rosette (center), revealing that an abundant group of nitrite-oxidizing bacteria called Nitrospinae dominate carbon “fixation” in the deep ocean.

Earth & Environment

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