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One of the most impressive photosynthesizers is a cyanobacterium called Prochlorococcus. It is estimated to be more abundant than any other photosynthesizer on the planet, and to be responsible for producing 20 percent of the oxygen in the atmosphere.
Video

Meet the obscure microbe that influences climate, ocean ecosystems, and perhaps even evolution

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Close-up photograph of translucent coral polyps, showing the symbiotic algae living inside.
Slideshow

Zooxanthellae and Coral Bleaching

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a frond of red algae
Photo

Fronds of Nori

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three pieces of sushi with chopsticks
Photo

Nori Wraps

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scientist Drew-Baker reads a book by her microscope
Photo

Mother of Nori

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scientist Drew-Baker reads a book by her microscope
Article

Saving Nori

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spindles of magnified green algae
Photo

Stringy Algae

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spindles of magnified green algae
Article

A Cancer Fighter from the Sea

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a leafy bunch of red algae on a rock
Photo

Irish Moss

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Kelps are large, brown algae that grow along coasts around the world, especially in cooler regions.
Article

What is a Sea Vegetable?

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a heat map showing a thick band from Africa, across the northern coast of South America and into the Gulf of Mexico
Photo

The Sargassum Belt

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Sargassum forms dense clumps up to the size of a beach ball that slowly rotate as they drift.
Article

Too Much of a Good Thing—the Atlantic Sargassum Belt

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