Some change is perceptible—the acute, the elating, the destabilizing. But the grand, literally world-shaping sort of change happens on a scale that humans simply cannot experience. This is deep time. As Lewis Hyde points out, though, climate change is rending the human experience in a way that allows deep time to seep through. Now, with the geologic knocking on our door, he looks back to examine how the concept of deep time first emerged, and how Charles Darwin’s theory of evolution rests on its massive shoulders.

How are we, who plant our corn in spring, who live with four-year election cycles and thirty-year mortgages—how are we to position ourselves in relation to the inhuman forces that have been shaping the earth for four and a half billion years and now seem to be accelerating? How, in short, shall we approach the climate crisis when the needed sense of proportion can be baffled by floods of geological time? As for the early theorists who first opened time’s floodgates, my question has been whether they left us tools or stories that might help guide the present, urgent work. How did Lyell and Darwin imagine and engage with deep time, and how might this be of service today?

More picks about geology

Meet the Oldest Rock in the West

Marcia Bjornerud | High Country News | January 9, 2026 | 4,246 words

“Wyoming’s 3.5 billion-year-old geologic history reminds us that Earth is ever-changing.”

Picture This: A Tectonic Revolution

Elise Cutts | Pioneer Works Broadcast | April 16, 2025 | 2,133 words

“With one map, Marie Tharp revealed the raw, rifted depths of the Atlantic—and changed what we thought we knew about the Earth.”

Here Come the Lionfish

James Bridle | Emergence Magazine | January 30, 2025 | 4,136 words

“Coming face to face with lionfish in the warming waters of the Aegean Sea, James Bridle traces the unfolding of geology, evolution, and empire that not only occasions this meeting, but binds us in relationship with this ‘invasive’ species.”