Glossary of "The Third Chimpanzee" by Diamond (2014)
- something from a past time in earth's history that has been preserved by being turned to stone; bones, plants, and footprints are among the traces of ancient life that have survived as fossils
Glossary of "Life (9th ed.)" by Sadava et al. (2011)
- Any recognizable structure originating from an organism, or any impression from such a structure, that has been preserved over geological time.
- Diamond, J. (Adapted by Stefoff, R.) 2014. The Third Chimpanzee, For Young People, on the Evolution and Future of the Human Animal. xiii + 370 pp. Seven Stories Press, New York.
- Sadava, D., Hillis, D. M., Heller, H. C. & Berenbaum, M. R. 2011. Life: The Science of Biology, 9th ed. -xliv + 1266 pp. Sinauer Associates, Inc., Sunderland.