Jellyfish Swarm Shuts Down Swedish Reactor

Moon jellyfish. (National Journal)

A massive swarm of jellyfish, Swedish engineers say, has shut down the world's largest boiling-water reactor, clogging intake pipes in that country's Oskarshamn nuclear power plant, The New York Times reports.

The pipes collect water to cool the reactors from 60 feet below the sea surface; officials said the jellyfish did not come near the reactor or the boiling water. This isn't a new problem, either: Nuclear power plants are often situated near large bodies of water, and this plant had a similar incident in 2005.