Volume 68, no. 4, p. 669-685, 2004. Page 682: The Acknowledgments section was inadvertently omitted and should appear as shown below.
I am grateful to Tom Lessie, Jill Banfield, and all of the members of my laboratory for reviewing the manuscript; Christina Matta for assistance with historical research and manuscript preparation; Carol Dizack for artistic contributions; C. Dizack and W. I. Welker for the photograph of Yellowstone in Fig. 3; and Jill Banfield, Brett Baker, and Gene Tyson for Fig. 2 and 7. The preparation of this review was funded by the National Science Foundation, Howard Hughes Medical Institute, and the College of Agricultural and Life Sciences at the University of Wisconsin-Madison.