Explains the occurrence of biological clocks, which, for example, tell birds when and where to migrate, plants when to unfurl their leaves, and which affect human beings in various physical and emotional ways.
- ISBN10 0140491872
- ISBN13 9780140491876
- Publish Date 27 July 1981 (first published 1 May 1979)
- Publish Status Out of Print
- Out of Print 29 January 2010
- Publish Country AU
- Imprint Penguin Random House Australia
- Format Paperback
- Pages 74
- Language English