Ice age
An Ice Age is a theory that the earth's average temperature dropped so much that glaciers extended into what we think of as temperate zones and that sea levels receded due to the loss of water to the ice.
The theory of an Ice Age is relatively new in the history of science. The theory develooped as humanistic scientists sought an explanation for evidence that conflicts with their view that Earth must be over a billion years old, and their view that no Flood occurred. The Ice Age theory seeks to explain the heavily eroded and rounded mountains of the northern Appalachian chain and large islands such as Cape Cod and Long Island.
According to the theory, the lowered sea levels may help explain for humanists the enigma of how man is found around the planet. Under this view, there were land bridges where now all we see is ocean and that Asians migrated to North America to become Native Americans and Europeans populated the British Isles in a similar manner. Note, however, blood types and other characteristics suggest there is no connection between American Indians and Asians.