I'm sure many of you have heard of the important discoveries at Gobekli Tepe?
Here is an audio interview of science writer Charles C Mann, who has twice visited the dig at the 11,500 year old monument. He was able to spend a good deal of time with the archaeologist Klaus Schmidt, in charge of the dig for many years, and reveals heretofore unpublished insights into its even greater antiquity and achievements.
Foremost of these is evidence of a proto-written language. This is found among the finely carved images, mainly animals, but also symbols such as waves and crescents found upon the huge rings of stone pillars. These are thought to work mnemonically, and may collectively constitute a language. They are studying it.
(This is a long interview. The part under discussion is found about 45% the way through)