By Rhett Ayers Butler [( In 1991, botanists Calaway Dodson and Alwyn Gentry advanced a striking proposition. Surveying a rapidly deforested ridge in western Ecuador, they suggested that dozens of ...

Speciation and extinction are the twin engines that have sculpted the diversity of life on Earth. Speciation, the process by which new species arise from ancestral populations, is driven by a mixture ...

The ivory-billed woodpecker was one of the most extraordinary birds to inhabit North America. This week, the U.S. Fish and Wildlife Service concluded that this bird – known for its striking red crest ...