Without a word, Bridget and I hurried to the edge of the dome. Placing our hands on the transparent fibrex, we gazed in awe out at Odin. Flocks of krill wafted by, blown about by atmospheric currents. Small predators chased the krill, larger predators chased the smaller. A pod of blimps floated by in the distance, shadowed by the usual mantas, hoping for an incautious juvenile to stray. For layer upon layer, above and below, different ecosystems dominated, shading from one to the next.