The Cow Knob salamander is standing — well, crawling — in the path of progress. The little amphibian lives nowhere in the world but a few mountain ridges in a wild and scenic region along the ...

Bill Hatcher Julie Meachen, an expert in Ice Age megafauna, skirts a dirt ledge called “the Saddle” deep inside a remarkable hollow in northern Wyoming known as Natural Trap Cave. She stops to ...