Geology
Rocks & minerals, geologic time, volcanoes, sedimentology, earthquakes, seismology, geodesy, geodynamics, plate tectonics, geothermal energy, rivers, debris flows, mudslides, landslides, hillslopes, permafrost
Geo- chemistry
Chemistry, environmental chemistry, organic chemistry, water chemistry, hydrology, stable isotopes
Geo- biology
Evolution, the history of life on Earth, microbiology, microbial ecology, microbial physiology, microbial energetics, plant physiology, carbon cycling, stable isotopes
Planetary sciences
Earth's climate, astrobiology, remote sensing, astronomy, Mars
