unbelievable-facts:To demonstrate the sharpness of stone tools,…

unbelievable-facts:

To demonstrate the sharpness of stone tools, Archaeologist Dr. Adrien Hannus elected to have major surgery done with obsidian blades rather than surgical steel scalpels. Obsidian is the sharpest substance known to mankind.

Source:

AMAZING FACTS

Unbelievable Facts

Leave a Reply

Your email address will not be published. Required fields are marked *