The findings suggest some plants can evolve backward, i.e., specialized species can revert to their more primitive forms. The plant in focus is the chain fern (Blechnaceae). Ferns are some of the ...

Basically, you take a piece of stone, bash it into a particular shape, and then get to knapping. If you created that particular shape properly – it should look a little like a tortoise shell ...

This process, known as flintknapping, can be boiled down to mastering force, angles and rock structure. When done properly, flintknapping creates the recognizable features that archaeologists use ...

Elden Pueblo Archaeological Site, U.S. 89, Flagstaff. 928-699-5421. 10 a.m.-2 p.m., Drop by Flagstaff’s first neighborhood at ...

Have you ever found yourself in a museum’s gallery of human origins, staring at a glass case full of rocks labeled “stone tools,” muttering under your breath, “How do they know it’s not ...