In this interactive map, peruse 28 possible pre-Clovis sites found throughout North America. To open the map, click on the image at left.—Robson Bonnichsen and Robert Lassen ...

This artifact was used for scraping fur from animal hides. For European and American Stone Age peoples, end scrapers served as heavy- duty scraping tools that could have been used on animal hides ...

Excavations at a Middle Stone Age archaeological site, Shinfa-Metema 1, in the lowlands of northwest Ethiopia revealed a population of humans at 74,000 years ago that survived the eruption of the ...