No scientific phenomena concern us as much as the daily evolution of weather systems. We live in a culture where weather, the state of the atmosphere at a given time and place,helps us define regional cultural variations. States such as...

The kit fox has been thought by some to be a subspecies of the swift fox. This fox currently inhabits desert and semi-arid regions between the Sierra Nevada Mountains and the Rocky Mountains and on down into Baja California and the North...

Open, rolling land and gentle slopes with shrubs are the habitat of Nelson's Antelope Squirrel, which lives only in a small region of California in and near the San Joaquin Valley. The squirrels live in relatively small colonies of six...

A map from 1898 of North America, Central America, Greenland, and the Caribbean to Puerto Rico showing the general distribution of rainfall in the region. The map shows areas of little or no rainfall to areas of heavy rainfall. The map...

A map of North America, Central America, and northern South America at the end of the American Revolutionary War (1783). The map is color-coded to show the territory of the United States at the time, British possessions in Canada,...

Redwood National Park comprises a region of coastal mountains bordering the Pacific Ocean north of San Francisco. It is covered with a magnificent forest of coastal redwood trees, the tallest and most impressive trees in the world. The...