The Kanjera Stone is one of oldest man-made object ever found. Archaeologists estimate that the tool is roughly two million years old.
https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpg
More:
https://www.smithsonianmag.com/smith...ool-180980330/
Previously:
https://www.homemadetools.net/forum/...373#post135256
https://www.homemadetools.net/forum/...105#post112500
https://www.homemadetools.net/forum/...521#post113857
