Obsidian tools dating back 20,000 years have been found in Poland. But it has no natural source of the volcanic glass. Instead, it appears to have been imported from as far as Turkey.

WARSAW, POLAND—According to a Science in Poland report, obsidian was used for making tools and weapons in what is now Poland at least 20,000 years ago, even though volcanic glass is not known to ...

Obsidian tools dating back 20,000 years have been found in Poland. But it has no natural source of the volcanic glass. Instead, it appears to have been imported from as far as Turkey.

Obsidian tools dating back 20,000 years have been found in Poland. But it has no natural source of the volcanic glass. Instead, it appears to have been imported from as far as Turkey.

Obsidian tools dating back 20,000 years have been found in Poland. But it has no natural source of the volcanic glass. Instead, it appears to have been imported from as far as Turkey.