http://photography.nationalgeographi...-521743-sw.jpg
"The center of Yellowstone National Park's Grand Prismatic Spring steams at 199 degrees Fahrenheit, too hot for the multicolored bacteria clustering on the cooler perimeter. But dead center is no dead zone: Billions of organisms called thermophiles flourish in the scalding water."
From "Making Sense of the Millennium," January 1998, National Geographic magazine
Photograph by George Steinmetz

Doug