Contributions by: Frank P. Ryan, William Day, Antonio Lazcano, Arturo Becerra, Luis Delaye, Kenneth H. Nealson, Eshel Ben-Jacob, Yoash Shapira, Alfred I. Tauber, Wolfgang E. Krumbein, Celeste A. Asikainen, Laurie Lassiter, James MacAllister, Bruce C. Scofield, Paul D. Lowman, Nathan Currier, Peter Warshall, Victor Fet, John L. Hall, Lynn Margulis, Andrew Maniotis, Robin Kolnicki, Sonya Vickers, Donald I. Williamson, Margaret McFall-Ngai, Jessica Hope Whiteside, Dorion Sagan, Gerhard Roth, John Skoyles, Judith Masters, Luis Rico