Why did the nomadic era of human history come to an end?

 Binford argued that early human beings would have lived where the hunting and gathering were best. As populations increased, so did competition for resources, among other stresses, leading some people to move to the margins, where they resorted to domesticating plants and animals.

Explanation:

12,000 years ago

"The change is occurring much later in our history." The lightweight bones don't appear until about 12,000 years ago. That's right when humans were becoming less physically active because they were leaving their nomadic hunter-gatherer life behind and settling down to pursue agriculture.