While walking in the woods, Meg and her dad find some ancient rocks that were important in creating the oxygen that supports life on our planet.
- ISBN10 0805024182
- ISBN13 9780805024180
- Publish Date 1 October 1995
- Publish Status Out of Print
- Out of Print 14 June 2021
- Publish Country US
- Imprint Henry Holt & Company
- Format Hardcover
- Language English