Striking steel and flint together creates sparks. But why? (Image credit: O_Lypa via Getty Images) Any outdoor survivalist worth their salt probably carries something in their pack to start a fire.

This Ancient Blade Was the iPhone of the Stone Age The Quina scraper is a small but highly specialized flint tool distinguished by its scalloped, razor-sharp edge designed for efficient skinning ...

Archaeologists have known that early humans started using stone tools called scrapers to process hides and scrape the flesh off bones about 1.5 million years ago. But these tools were mostly used ...