A killer has been caught in the act: the first before-and-after view of an infectious disease that led to an amphibian die-off has been released by the scientists who tracked it. Like a wave, incidence of the fungal disease that wipes out Central American frogs--chytridiomycosis--advances through the region's highlands at a rate of about 30 kilometers per year.
After the disappearance of Costa Rica's golden frogs in the 1980s, Karen Lips, a biologist at the University of Maryland, established a monitoring program at untouched sites in neighboring Panama.
