Autor: Turner Raymond M. Turner

First developed in the 1880s as a way to monitor glaciers in Europe, repeat photography -the practice of taking photographs at different points in times from the same physical vantage point-remains a …

Botanist Homer L. Shantz took photographs of the Kenyan landscape in the early 1920s as part of his effort to document the natural plant cover of Africa. He returned there with B. L. Turner in the la …

In prehistoric times, the Santa Cruz River in what is now southern Arizona saw many ebbs, flows, and floods. It flowed on the surface, meandered across the floodplain, and occasionally carved deep ch …

The Sonoran Desert, a fragile ecosystem, is under ever-increasing pressure from a burgeoning human population. This ecological atlas of the region’s plants, a greatly enlarged and full revised versio …

The Changing Mile, originally published in 1965, was a benchmark in ecological studies, demonstrating the prevalence of change in a seemingly changeless place. Photographs made throughout the Sonoran …