Photographer Page

Paul Zahl

A family examines a circle of mushrooms, a phenomenon that medieval Europeans once called a fairy ring, in a green meadow in New Jersey. The image was published in a story about fungi in the October 1965 issue.

Bioluminescent dinoflagellates, a kind of algae, glisten under a microscope.

A Costa Rican variable harlequin frog perches on a plant in this photo from the July 1973 issue. Today, the tiny frog is listed as critically endangered due to environmental changes caused by climate change.

The Great Pyramid of Cholula, in Puebla, Mexico, is the largest known pyramid in the world. Construction started in the 3rd century B.C. and the temple on top was added by Spanish colonisers in the 16th century. Behind it stands Popocatépetl, an active volcano and the second highest peak in Mexico.

Boaters on an underground river enjoy a facsimile of the night sky created by a galaxy of glowworms on the roof of the Waitomo Caves on New Zealand's North Island. The tiny worms have become a rather large tourist attraction, and the caves they call home also boast notable stalactites, stalagmites, and interesting limestone rock formations.