The various tribes/nations in Siberia and Central Asia are known to have moved North and South with the changes in the climates. Sometimes it was perfect for grass, and sometimes less so.
Nearer the coasts ~ e.g. the Scandinavian Peninsula or Kamchatka and Korea, the changes were moderated by the ocean, but they still happened.
We can dig up their stuff and see when they lived there ~ and sometimes we can actually tell who they were.
The Turkish speaking tribes of Central Asia regularly went as far South as India and as far North as the Arctic ocean. The spans of time for these moves are enormous, but they kept the memories alive so when conditions were right they could go where they needed to go. Sometimes they took over India. Other times they didn't.
In Eastern Asia just North of India's Ganges watershed only one Turkish speaking tribe is known to have gone North to Siberia, then South to India, then back North, and so forth.
Other groups would move East or West to take advantage of better grazing lands. Yet more groups would move up and down the coastlines to hunt seal, or to fish.
Based on what people were doing in Asia it looks like the major cycles last a thousand years or so, with the smaller cycles lasting a few hundred years.
The anthropogenic global warming crowd seem to want the rest of us to believe that these cycles have stopped!
Well you might think there is a HIDDEN AGENDA....
Oh and the crowd is up to their old censorship tricks....see this comment :
****************************EXCERPT*********************************
Jimbo says:
I just posted to Climate Progress more contrary, peer reviewed papers concerning historic Arctic ice melt and don’t even see the words “your comment is awaiting moderation” whereas previously I did. Now I’m getting:
“Error 503 Service Unavailable
Service Unavailable”
This is how you know you are over the target. :o)