William Wood of Humboldt State University examined the chemical properties of skunk spray samples.

Scientists are struggling to understand why frogs are dying all over the world. But everyone can be a part of the solution. Here are some ways you can help.

Scientist Tyrone Hayes is studying the how agricultural chemicals, including fertilizers and pesticides, are affecting the health of frogs.

Chemical pollution, including pollution from polychlorinated biphenyls (PCBs), has been linked to health and reproductive problems in dolphins and orcas.