Jeff Vanuga / Steve Fuller photographing in the West Nymph Lake Creek Geyser area, Yellowstone National Park, Wyoming, USA, October 2008

Steven Fuller / Lodgepole pine seedling growth after forest fire in Lodgepole pine forest, Yellowstone NP, Wyoming, USA. 1988

Steven Fuller / Regrowth of vegetation after forest fire in Lodgepole pine forest, Yellowstone NP, Wyoming, USA. 1988

Steven Fuller / Bison walking through remains of forest of Lodgepole pines burnt by fire, Yellowstone NP, Wyoming, USA. 1988

Steven Fuller / Smoke from forest fire billows into the sky above Yellowstone NP landscape, Wyoming, USA.

Steven Fuller / Lodgepole pine seedlings grow in Lodgepole pine forest destroyed by forest fire, Yellowstone NP, Wyoming, USA. 1988

Steven Fuller / Plants regenerating after forest fire in Lodgepole pine forest, Yellowstone NP, Wyoming, USA. 1989

Steven Fuller / Flames engulf Lodgepole pine trees in forest fire, Yellowstone NP, Wyoming, USA. 1988

Steven Fuller / Bark of Lodgepole pine after forest fire, Yellowstone NP, Wyoming, USA. 1988

Steven Fuller / Flames engulf Lodgepole pine trees in forest fire, Yellowstone NP, Wyoming, USA. 1988

Steven Fuller / Burnt trunk of Lodgepole pine tree killed in forest fire, Yellowstone NP, Wyoming, USA. 1988

Steven Fuller / Bison graze in winter beside Lodgepole pine forest destroyed by forest fire, Yellowstone NP, Wyoming, USA. 1988