Valuable viruses / Frank P. Ryan
More like a waterfall / William Day
Alarmones / Antonio Lazcano, Arturo Becerra, and Luis Delaye
Early sensibilities / Kenneth H. Nealson
Smart bacteria / Eshel Ben-Jacob, Yoash Shapira, and Alfred I. Tauber
Ancient architects / Wolfgang E. Krumbein and Celeste A. Asikainen
Others / Laurie Lassiter
Nested communities / James MacAllister
Cosmic rhythms of life / Bruce Scofield
Life's tectonics / Paul D. Lowman Jr. and Nathan Currier
Evolutionary illumination / Peter Warshall
Symbiogenesis in Russia / Victor Fet
From movement to sensation / John L. Hall and Lynn Margulis
Packaging DNA / Andrew Maniotis
Lemurs and split chromosomes / Robin Kolnicki
Interspecies hybrids / Sonya E. Vickers and Donald I. Williamson
Origins of the immune system / Margaret J. McFall-Ngai
Medical symbiotics / Jessica Hope Whiteside and Dorion Sagan
Animal consciousness / Gerhard Roth
Brains and symbols / John Skoyles
Thermodynamics and thought / Dorion Sagan
"I know who you are, I know where you live" / Judith Masters
Cultural networks / Luis Rico
Bibliography
Appendix A. Major groups of living organisms
Appendix B. The international geological time scale.