Perhaps they were the earliest form of social media.
A Prehistoric Facebook with...
Og kill 3 deer. Family feast. #blessed
The response from friends:
Ak-Ak and 57 others like this
Duk and Unga have sent you friend requests
Og's team better than Ngu's team #nguteamhateweek
Baby Oonga 6lbs 7oz
Spring Break 3156 BC
Vague Status Updates:
And even the occasional NSFW:
Maybe social media is not a new idea at all!
You are now friends with MyspaceTom.