by: Rebecca Jacobson

With a “billion billion billion” Prochlorococci in the ocean — that’s 1,000,000,000,000,000,000,000,000,000 — you would think they’d be easy to find. But 25 years ago, no one knew this microscopic organism existed.

And it’s a good thing they do. Without their ancestors, we wouldn’t be breathing, says Penny Chisholm, an oceanographer who sails the seas searching for the stuff.

Read the full article here.


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