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An '''Ice Age''' is a modern theory first proposed by supporters of evolution and an old earth to explain anomalies such as the existence of the [[Great Lakes]].  The theory suggests that there were one or more periods of [[Earth]]'s history when [[ice]] sheets covered a much larger part of the [[planet]] than is currently the case.

An '''Ice Age''' is a modern theory first proposed by supporters of evolution and an old earth to explain anomalies such as the existence of the [[Great Lakes]].<ref>[[Charles Lyell]], a close friend of [[Charles Darwin]] and a supporter of evolution, was the first leading proponent of a global Ice Age.</ref> The theory suggests that there were one or more periods of [[Earth]]'s history when [[ice]] sheets covered a much larger part of the [[planet]] than is currently the case.

Earth and rock worn and smoothed by ice sheets, along with U-shaped [[valley]]s and termination deposition debris, are the main evidences for an Ice Age, and there is evidence of such [[glacier|glaciation]] covering northern [[Europe]] (including most of [[Britain]]), most of [[Canada]], and into the northern parts of eastern half of the [[United States]].<ref Name="WBE">Ice Age, World Book Encyclopedia 2000 CD ROM</ref>

Earth and rock worn and smoothed by ice sheets, along with U-shaped [[valley]]s and termination deposition debris, are the main evidences for an Ice Age, and there is evidence of such [[glacier|glaciation]] covering northern [[Europe]] (including most of [[Britain]]), most of [[Canada]], and into the northern parts of eastern half of the [[United States]].<ref Name="WBE">Ice Age, World Book Encyclopedia 2000 CD ROM</ref>