Scientists had previously estimated that there are 10 million viruses in every drop of surface seawater, comprising 15,000 different viral species. Now a report in Cell shows that there are close to 200,000 marine viral species — a tenfold increase over those previous estimates.

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Scientists had previously estimated that there are 10 million viruses in every drop of surface seawater, comprising 15,000 different viral species. Now a report in Cell shows that there are close to 200,000 marine viral species — a tenfold increase over those previous estimates.