Photo: Deadly Frog Fungus Spreads in Virus-Like Waves

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Red-eyed tree frogs in Costa Rica are just one of many species of amphibians on the decline worldwide.

A main culprit is the deadly chytrid fungus, which researchers recently found moves in waves like other infectious diseases.

The new research challenges a theory that climate change drives the fungus's spread.

Photograph by Michael & Patricia Fogden/Minden Pictures/Getty Images

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