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© CNRS Images - 2015
Every day, marine viruses kill 40% of our oceans' bacteria. And yet these biological entities are still poorly known. For example, we still know little about their role in the regulation of microalgae, the first link in the food chain that also produces close to a quarter of our planet's oxygen. We travel to the Roscoff Marine Station to see how researchers there are trying to isolate, and better understand these fearsome predators.