They found a civilization in Africa about 1500 square miles across. And it is dated between 160 thousand and 200 thousand years old.
How they dated it was cool. There is a giant series of stones set up like a star chart. Focused on orions belt. But the star chart doesn't currently match up with orions belt in our time period. But it did between 160k and 200k years ago.

Interesting read
http://www.viewzone.com/adamscalendar.html