Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Too much on ecology, too little on geology!

I like the title, no question about that. But, I prefer to see more comprehensive coverage on geology, the true Earth biography, than ecology. For example, there are three types of volcano: Cinder Cone, Composite, and Shield. There is no mentioning of that in the Volcano section. I watched the entire Weather section, didn't see rock cycle or cloud types. The hot spot underneath Yellowstone is the same as the one under Hawaii. A type of its hot spring bacteria helps the explosion of DNA application and human genome project through something called polymerase chain reaction. It would be more exciting to include that. All the 3D computer graphic images and animation are great! I love them! If this series would added more formal science such as geology, meteorology and paleontology, offers more comprehensive presentation on major subjectives of each discipline, it would become more useful to students than just the general audiences.