Pt. 3. Lecture 37. Glaciers : the power of ice
Lecture 38. Planetary wobbles and the last ice age
Lecture 39. Long-term climate change
Lecture 40. Short-term climate change
Lecture 41. Climate change and human history
Lecture 42. Plate tectonics and natural resources
Lecture 43. Nonrenewable energy sources
Lecture 44. Renewable energy sources
Lecture 45. Humans : dominating geologic change
Lecture 46. History of life : complexity and diversity
Lecture 47. The solar system : Earth's neighborhood
Lecture 48. The lonely planet : Fermi's paradox.
