DISCOVERIES IN THE EARTH SCIENCES
12 Solid Earth
Earthquakes by Susan E. Hough * Volcanoes by Tobias Fischer * Geothermal Energy by Marnell Dickson * Structure and Tectonics by Mary Hubbard * Metamorphism by Michael Brown * Clay Science by Ray Frost * Geochemistry by Neil C. Sturchio
Caves and Karst by Chris Groves * Hydrology by Venkat Lakshmi et al. * Hydrogeology by William Cunningham et al.
Geologic Mapping by Milt Wiltse * Economic Geology by Richard M. Tosdal * Petroleum Geology by William T. Drennen III * Coal by Leslie Ruppert et al.
24 Life through Time
Vertebrates by Donald R. Prothero * Invertebrates by Warren D. Allmon * Geoarchaeology by Chris Hill * Palynology by Fredrick J. Rich and Gordon D. Wood * Paleobotany by Melanie L. DeVore and Kathleen B. Pigg
Paleoceanography and Paleoclimatology by Thomas Marchitto Jr. * Ocean Drilling by Thomas A. Davies * Glaciology by Terence J. Hughes
31 Beyond Earth
Planetary Geology by Martha S. Gilmore
Sustaining Earth and its People
Soil scientists can contribute to evolving challenges of feeding Earths growing population.
John Doran and J. Thomas Sims
6 NEWS NOTES
52 GEOLOGIC COLUMN
2 From the Editor
4 Letters: Perspectives from readers
32 Where on Earth?
36 Benchmarks: Looking back in Geotimes
37 Energy & Resources
38 Society Page: News from geoscience societies
39 In Memoriam: Stephen Jay Gould
46 Classified Ads: Career Opportunities
51 Contributors Page