Colecção de 18 Livros "Time-Life Planet Earth":
- Volcano
- Rivers and Lakes
- Underground Worlds
- Arid Lands
- Atmosphere
- Ice Ages
- Edge of the Sea
- Earthquake
- Flood
- Gemstones
- Grasslands and Tundra
- Solar System
- Forest
- Continents in Collision
- Storm
- Noble Metals
- Glacier
- Restless Oceans