Since its inception, nuclear energy has faced a host of opposition, from oil conglomerates to well-intentioned anti-nuclear-weapons activists to environmental groups. As it turns out, even ocean critters are getting in on the movement.

Over the weekend, a swarm of angry jellyfish forced the Gravelines Nuclear Power Station in France — one of Europe's largest — to take four of its six reactors offline. As reported by the New York Times, the "massive and unpredictable presence of jellyfish" was first detected in the filters of the plant's massive ocean water pumping stations, which are used to cool the reactors.

While water-cooled nuclear plants typically have screens preventing ocean life from getting sucked into the cooling system, a large enough swarm of jellyfish can block the screens,

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