Which worry stone is best? There are certain practices so ancient and pervasive that it’s hard to pinpoint just where they started. The use of worry stones — smooth rocks which have a groove into ...

These genomes shed light onto what was going on in Africa even earlier than ... For instance, obsidian, a type of stone particularly suited for making tools, was moved over long distances. “We can ...

Archaeologists have made pre-Viking Norse language discovery atgrave site containing pieces of stone inscribed with Germanic ...