Allow yourself to be taken back into deep geologic time when strange creatures roamed the Earth and Western North America looked completely unlike the modern la
Imagine seeing the varied landscapes of the earth as they used to look throughout hundreds of millions of years of earth history. Tropical seas lap on the shore
Allow yourself to be taken back into deep geologic time when strange creatures roamed the Earth and Western North America looked completely unlike the modern la
Based on the comprehensive, award-winning book Rivers of North America, the new Field Guide to Rivers of North America describes 200 of North America’s most s
The incredible story of the creation of a continent—our continent— from the acclaimed author of The Last Volcano and Mask of the Sun. The immense scale of g