America's Ice AgeStreaming Video - 2011
Why does Earth have ice ages, and when is the next one due? In a journey through time, this program charts the progress of different glaciations to depict how ice shaped modern North America.
Publisher: New York, N.Y. : Films Media Group, 
Copyright Date: �2010
Characteristics: 1 streaming video file (45 min.) : sound, color.
Alternative Title: How the Earth was made (Television program)