The Cerutti Mastodon site in California has become one of the most controversial prehistoric sites in North America because ...

Thousands of years ago, North America was home to bears far larger and more powerful than anything alive today. Some species could crush bones with ease and dominate entire ecosystems. Early humans ...

CNN — Research on ancient footprints has previously challenged what's known about when people arrived in North America, and a new discovery could shed more light on the story. Scientists have found 88 ...

Add Yahoo as a preferred source to see more of our stories on Google. Studying preserved footprints in New Mexico continues to provide insight into the first human movements in North America. A ...

David Bustos heard about the “ghost tracks” when he first went to White Sands National Park in New Mexico to work as a wildlife scientist in 2005. When the ground was wet enough at certain times of ...