There was one ice age, and there is going to be another ice age.
Consequently these areas were early opened at the close of the ice age.
Other factors since the ice age have altered or modified this glacial topography.
Why should the passing away of the ice age increase the size of the brain?
The other department was that which embraces the story of the Ice Age.
They can only have been brought here by the great glaciers of the Ice Age.
The latter period is known to us as the Ice Age or Glacial period.
At this point are striking evidences of the work of the ice age.
And it was in all probability the coming on of the Ice Age that did the weeding.
This shortening of our conception of the ice age renders glacial man a comparatively modern creature.