The 2009 discovery of footprints (human and animal) left behind in layers of clay and silt at New Mexico’s White Sands National Park sparked a contentious debate about when, exactly, human cultures ...

A Neanderthal trackway discovered in Portugal shows how an adult male and two children hunted for food 78,000 years ago.

A couple of geological researchers, Carlos Neto de Carvalho and his wife, Yilhu Zhang, have found a series of Neanderthal footprints embedded in sandstone rocks from collapsed cliffs on the beautiful ...

Ancient seas left an expanse of rolling gypsum dunes known as White Sands in New Mexico, and within this surreal landscape lies evidence that humans have roamed the Americas for at least 20,000 years.

While the footprints only became public in recent years, they were actually discovered decades ago by a group of looking for adventure in the small mountain town of Ouray.