Part 1: The Solid Earth Hypothesis
    1. The standard earth model
    2. Deep drilling springs surprises
    3. Mass, density, and seismic velocity (09/05)
    4. Deep earthquakes
    5. Geomagnetism
        References

Part 2: The Hollow Earth Hypothesis
    1. Early theories
    2. Modern theories
    3. Hollow moons
    4. Feasibility -- I (06/04)
    5. Feasibility -- II (08/05)
        References

Part 3: Polar Puzzles
    1. The open polar sea
    2. The north pole controversy
    3. Polar land coverup?
    4. Flights of fancy
    5. Auroras and the poles
        References

Part 4: Mythology, Paradise, and the Inner World
    1. The Imperishable Sacred Land
    2. Shambhala
    3. A northern paradise
    4. Inner kingdoms
        References