Dennis Dimick has focused his journalism career on the collision between human aspiration and the planet. The son of fisheries biologists, Dimick grew up on a farm in Oregon’s Willamette Valley, and he holds degrees in agriculture and agricultural journalism from Oregon State University and the University of Wisconsin-Madison. In his 35 years at National Geographic, he served for over a decade as the magazine’s environment editor, and guided major projects on climate change, energy, freshwater, population, and food security. Dimick is co-founder of Eyes on Earth, a project meant to inspire a new generation of environmental photographers.
As a young man, Dimick witnessed firsthand the price of progress when his family’s farm was cut in half by the construction of an interstate beltway. This invasion of their farm, in addition to the clear-cut logging of nearby forests where Dimick had spent his youth, combined to sensitize him to the profound impacts of human progress on the Earth. Early photography experience and his personal connection to the effects of human progress led to a life and career spent combining these two dimensions.
In anticipation of hisparticipation in the 2018 Wisconsin Science Festival, I asked Mr. Dimick some questions about photojournalism, and what it’s like documenting the human impact on the environment. Some of his answers have been slightly edited for clarity.
The 4.54 billion-year history of the earth is divided into many subdivisions: eons, eras, periods, epochs, and ages with each division representing a smaller chunk of geologic time. If you are a parent of a young child and you happen to have viewed several episodes of the children’s educational program Dinosaur Train, you are probably familiar with the Mesozoic Era and the Triassic, Jurassic and Cretaceous periods.
Geologic history is recorded in rocks—layer upon layer accumulates, each layer revealing the geological, ecological and biological events that occurred over the time period that it was deposited. These geologic records tell us about the plants and animal life that could be found hundreds, thousands or millions of years ago. The minerals and chemicals of the rocks can tell us about climate, and sudden changes in the rock layers can tell us about sudden changes on earth.
Many natural forces have shaped the Earth that we know today. Bombardment from extra-planetary objects has left craters and correlate mass extinction events in the geologic record (1). Oceans once covered areas that are now prairies, where if you look long enough or deep enough you might just find a fossil of a previously unknown fish (2). Wind has shaped the earth by eroding and depositing soil. The Loess Hills of western Iowa, USA, (3) and the Loess Plateau of China (4) are two examples of wind-created land forms each created by the slow, wind-driven deposition of soil particles. Of course, water too, is a major force for creating canyons and gorges. The Indus River in Asia, for instance, has been estimated to deepen its course between 2 and 12mm/year in the gorge areas and is capable of removing blocks of rocks measuring up to 70cm (5), and the Grand Canyon in the United States was formed by the erosive power of the Colorado River (6).