©1998 Joe McNally
Jody at School
Another of McNally's cover stories for National Geographic was an extraordinary essay that he photographed on the human brain. "The brain story was very difficult in the sense that you're photographing this organism, this real thing that you can't see," he says. "All you can see is the behavior that results or things that you somehow relate to mental functions."

Finding ways to relate the "mental state" to something tangible that he could photograph was a particularly daunting task he says. "Say you're photographing Alzheimer's," he explains. "Alzheimer's is a state of mind and it's a mental impairment so how do you photograph that? It was difficult. You had to think long and hard about a way to approach it."