Corridors of time : 1,700,000,000 years of Earth at Grand Canyon / panoramic photography and text by Ron Redfern ; ill. by Gary Hincks ; introd. by CaCorridors of time : 1,700,000,000 years of Earth at Grand Ca…de Ron. Gary Hincks . Carl Sagan. Redfern1 pointJ'aiJe veux
