Traces the development of the first mammals, many of which grew to giant proportions in order to survive the cold temperatures and violent changes of the Ice Age.
- ISBN10 0870444247
- ISBN13 9780870444241
- Publish Date 1 January 1983
- Publish Status Active
- Out of Print 8 December 1993
- Publish Country US
- Imprint MapQuest.com
- Format Hardcover
- Pages 104
- Language English