I was dissatisfied with existing geologic timelines because they all end with now. I wanted to include room on the timeline to visualize the future, which, in some ways, is just as real as the past. Please let me know ways it can be improved.

Together with Mary Clare and the students of ENVS 223 Soil Ecology, I have put together a fairly excellent soil food web. A picture that’s worth 10,000 words. Start with the key at the bottom. Please let me know ways it can be improved.

Local and global nitrogen and phosphorus cycles that might do a better job of showing the more common versus less common circuits. Please let me know ways they can be improved.