National Public Radio: A deadly fungus that's been devastating frog populations is spreading across the globe it's helped drive the extinction of 200 species so far. In California, the chytrid fungus has moved inexorably across the Sierra Nevada, leaving thousands of frogs dead. But scientists are trying to turn the tide against the fungus with an experimental treatment, one that could matter to frogs worldwide. They're making a last-ditch effort to save the endangered mountain yellow-legged frog by immunizing it against...