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The wooly devil (Ovicula biradiata) was discovered by a volunteer at Big Bend National Park. (Image credit: James Bailey © California Academy of Sciences) While walking in Big Bend National Park in Texas' Chihuahuan Desert, a park volunteer came across a fuzzy flower that turned out to be a never-before-seen species. The "woolly devil," as researchers have named it, is in the sunflower family and also represents a new genus. This is the first time in nearly 50 years that a new plant genus has been described in a U.S. national park, since the discovery of the July gold shrub...

A hunter-gatherer who trekked through a desert oasis a hundred centuries ago left the continent’s most lasting impression: the oldest known human footprints in North America. There are only two of them — one left and one right — but the ancient traveler’s path through mineral-rich sediment in the Chihuahuan Desert allowed them to become enshrined in stone, and now dated, some 10,500 years later... The tracks were first discovered during highway construction in northeastern Mexico, about 300 kilometers from the Texas border, in 1961. They were excavated and taken to a local museum for study, but their precise location...