I dunno. Don't early counting sticks have pretty regular notches?
Precise parallel incisions 40,000 years ago. Fits my idea that art is often a reliable signal of conscientiousness http://bit.ly/2oEdsdM https://twitter.com/Jamie_Woodward_/status/847579943940829184 …
-
-
-
Even if it's just a counting stick, it's still fascinating. Counting and using numbers requires abstract thinking.
End of conversation
New conversation -
-
-
Informative piece, adding that paper to my
#TIP dataset http://www.tortucan.wordpress.com relating to cognitive evolutionThanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.