This might have happened repeatedly in the millennia that followed.
It is wasteful to throw out a repository of patterns, some of which may have been established over millennia.
It has survived relatively unchanged for millennia, because it is cost-effective, productive, and in many societies, an integral part of community life.
Some of these scripts originated in the distant past, emerging out of traditions of remonstrance and petition stretching back for millennia.
Over millennia, speciesism has compiled a hefty volume.
Speculative building has long been a part of urban history, not just for centuries, but for millennia.
Material culture does not normally exhibit millennia-long traditions with tree-like splits.
Prevailing conditions during the first few tens of millennia after the origin of time were uniform, symmetrical, equilibrated and boring.
