A few miles distant from Oxford are Wytham Woods. This forest has become one of my favorite places to visit, a quiet place reachable by a few miles’ cycling over canals and country lanes. In spring the woods are painted with the flowers of bluebells (Hyacinthoides non-scripta). It is perfect for a solitary walk, but…

The spring blooms of the North American desert are long since over, but the same cannot be said everything. In England, spring is just arriving, in a tumult of wind and fog and rain and the occasional bright sunny day. I just moved across one continent and one ocean and have been given the distinct…

Think of a community populated by saguaros, prickly pears, and agaves – do you imagine a warm place or a cold place? These species are warm-adapted, so a guess that the community is warm is a reasonable one. But what if the community were actually cold and snowy, like below? This would reflect ecological disequilibrium,…

After six years of living in Arizona, I had never visited the Grand Canyon. That finally changed this year. It was a marvelous ecological experience. The descent into the canyon is a journey back in time that ultimately reaches basement rocks that are nearly two billion years old. And it is also a journey through…