The Quest for a Universal Theory of Life

Carol E. Cleland is Professor of Philosophy at the University of Colorado Boulder, where she is also Director of the Center for the Study of Origins and a Co-Investigator at the Center for Astrobiology. She teaches advanced interdisciplinary courses in the philosophy of science, including graduate seminars on central issues in astrobiology. She publishes papers in major science and philosophy journals, and is co-editor of the anthology The Nature of Life (Cambridge, 2010).

• Acknowledgments; Introduction; 1. The enduring legacy of Aristotle: the battle over life as self-organization or (genetic-based) reproduction; 2. Why life cannot be defined; 3. What is a scientific theory; 4. How scientific theories develop; 5. Challenges for a universal theory of life; 6. Rethinking the traditional paradigm for life: lessons from the world of microbes; 7. Artificial life: could ALife solve the N=1 problem?; 8. Searching for extraterrestrial life without a definition or universal theory of life; 9. A shadow biosphere: alien microbes on Earth?; Conclusion; References; Index.

'What is life? What universal principles apply to any biosphere? Our efforts to answer these deep questions are stymied because of our biased, Earth-bound perspective with only one kind of (known) life. In a book rich with original ideas and lucid insights, science philosopher Carol E. Cleland considers life from the perspective of what we don't know - the limitations, hidden biases, sloppy definitions, and false assumptions that may lead us astray. From 'shadow biospheres' on Earth, to artificial life in the lab, to alien lifeforms in distant galaxies, Cleland expands our minds and leads us to rethink what we thought we knew.' Robert Hazen, Carnegie Institution for Science, Washington