Downfall:

1. Population Bottleneck
2. Can Humanity Survive The 21st Century?
3. Nuclear Waste Per State

Tragedy & The Dark Knight:

1. Christopher Nolan: The Dark Knight Rises & The Apocalyptic Epics (The Directors Series)

Aristotelian Tragedy:

1. Oedipus As The Ideal Tragic Hero

Food:

1. Food, Culture & Culinary Traditions
2. Best Restaurant In The World

Fuel: 

1. Coffee Logs: The New Biofuel
2. Green Gasoline Made From Wood Chips
3. How To Make Steam Power Plant At Home

Survival:

1. 32 Survival Skills For Kids
2. The More You Know, The Less Your Carry

Mystery:

1. Mystery Aircraft Over Oregon

Writing:

1. Tricking High School Students Into Writing A Research Paper
2. High School Research Assignment

Education & Behavior:

1. The F-Bomb