Soviet Russia needed lighthouses on their uninhabited Northern Coast, so they built automated lighthouses powered by small nuclear reactors.
100 Mind-Blowing Reactors Facts
Jellyfish almost caused mass nuclear explosions in 2013. In the extremely warm summer of 2013, several nuclear power plants across the world were forced to close down because of jellyfish. The sudden increase in jellyfish clogged the filters that cooled down the reactors, which led to the power plants being shut down for immediate maintenance and safety measures.