When Felix d’Herelle discovered the first bacteriophage in French soldiers in 1917, many scientists refused to believe that such a thing actually existed. A century later, it’s clear that Herelle had found the most abundant life form on Earth. Ever since Proctor’s discovery of the abundance of marine viruses, scientists have been documenting their massive influence on the planet. Marine phages influence the ecology of the world’s oceans. They leave their mark on Earth’s global climate. And they have been playing a crucial part in the evolution of life for billions of years. They are, in other
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