For millennia, a community considered its priests vital to its survival.
Perhaps there was none in most of man's actions over the millennia.
The clam may survive man by as many millennia as it preceded him.
The bucolic mind does not readily abandon the practices of millennia.
All these peoples have changed greatly during past millennia both for better and worse, usually probably in the latter direction.
It applies to every great migration of peoples extending over centuries or millennia.
Surely in all Earth's millennia of social evolution man has worked out something better than either of your teams have built here.
In a week, he thought, he should be able to duplicate all the skill that millennia had evolved into Birds.
This is probably a recapitulation of what was accomplished in the course of millennia in the history of the Amphibian race.
There was no real talking to these peasants; too many millennia lay between, and you couldn't shout across that gulf.