Introduces some animals that lived long ago, such as the giant sloth, camelus, huge roaches, and uintatherium.
- ISBN10 0590407074
- ISBN13 9780590407076
- Publish Date 1 October 1987
- Publish Status Out of Print
- Out of Print 14 June 2021
- Publish Country US
- Imprint Scholastic
- Format Hardcover
- Language English