Frog-killing disease has origins on Korean peninsula

In the 1970s and 1980s, frogs and other amphibians seemed to be disappearing overnight. By 1999, researchers had determined that the culprit was a deadly disease caused by the chytrid fungus, which infected the animals with tiny swimming spores.

Today this disease, called chytridiomycosis, is thought to be one of the deadliest on the planet. It infects hundreds of species of amphibians and is thought to have wiped out a third of all frog species.

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