Jar of Dead Frogs (image) Smithsonian Tropical Research Institute Caption Researchers still do not understand how the frog-killing fungus moves from site to site. They encourage all visitors to highland sites in Central America to carefully clean and clorox their boots in between sites, as they do. Credit K. Lips Usage Restrictions Credit: K. Lips Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.