As executive producer and director of remote imaging at National Geographic, Marshall has a really cool job. Basically, he gets to attach highly sophisticated camera equipment he invented to wildlife such as emperor penguins, seals, killer whales, lions, tigers, and bears. All of this does have a point.

Marshall's Crittercam was designed to attach painlessly to an animal to document life from its perspective, recording video, audio, depth, temperature, light, and velocity. The first breakthrough images were broadcast on the National Geographic Explorer TV series in 1993. Used in National Geographic filmmaking and in a series called Crittercam Chronicles that aired on the National Geographic Channel, Crittercam has changed how we study wildlife.

Innovation Sparks Success
Marshall got the idea for Crittercam while swimming behind a shark, noticing the tiny remora hitchhiking along. He figured if he could design a camera small and light enough as to be innocuous to the animal, he could shift the point of view from researcher to subject, taking us light years ahead in our capacity to understand animal behavior. Since 1986, Crittercam has been successfully used on countless marine species and recently made the leap to land animals.

Crittercam: A Wild Point of View
See how Marshall and National Geographic developed Crittercam through the years. Along the way they have learned from the challenges of its application, used creative problem solving, and gained scientific insights. This presentation includes significant Crittercam footage from a variety of marine life. (This presentation can be tailored for children with added emphasis on the career choices of science and filmmaking.)

The Agony and the Ecstasy of Natural History Filmmaking at National Geographic
A visually spectacular romp through the blood, sweat, and tears invested in making the world's most extraordinary wildlife and conservation films.

"Greg captivated every patron in attendance. Children and adults alike were inspired by where Greg's curiosity has taken him and the limitless possibilties ahead."

– Martin Library