Take the case of the American bison: The ice-age bison evolved into the Plains buffalo, Bison bison, perhaps 10,000 years ago.
It is now generally held that there were more than one ice-age, with inter-glacial breaks.
Nor is there any sign of moraines, glacier-scorings or other traces of the ice-age.
Modern geologists speak rather of a series of successive ice-sheets than of one definite ice-age.
The ice-age might once more be renewed and wipe out our civilization.
The chief point to be determined is not whether man did or did not precede the ice-age.
A full description of the effect of the great ice-age would occupy a volume.
It is an established fact that the land sank very considerably during the ice-age, and has risen again since the ice disappeared.
However that may be, the ice-age would restrict all the Primates to the south.
We turn now to consider the effect of the great ice-age, and the relation of man to it.
|ice age |