Volume 9 (1999)
| Gary J. Axen | Science Article PDF |
| Robert A. Berner | Science Article PDF |
| W.S. Broecker | Science Article PDF |
| W.J. Devlin | Science Article PDF |
| David A. Ferrill | Science Article PDF |
| Karl E. Karlstrom | Science Article PDF |
| David W. Krause | Science Article PDF |
| Ivo Lucchitta | Science Article PDF |
| Donald R. Prothero | Science Article PDF |
| Richard W. Saltus | Science Article PDF |
| Steven M. Stanley | Science Article PDF |