A photograph of the Grand Canyon may tell a thousand words, but a thousand words don't even begin to tell the canyon's story, which spans almost 2 billion years. This section tell some of that story. "The Landscape" discusses rock layers and how the canyon was carved. "The Flora" describes common plants, ranging from fir trees on the rims to barrel cacti on the canyon floor. "The Fauna" covers the creatures that flourish in the canyon's forbidding climes. Finally, "The Ecosystem" explores a very recent development -- the humans' effects on the canyon's ecology.
