Mount Elbrus is in the Caucasus Range, the mountains that separate Europe and Asia.
Olduvai Gorge is a rich archaeological site in Tanzania where evidence of the first humans has been found.
Leonardo da Vinci, perhaps most noted as an artist, was also an architect, inventor and chronicler of science, among other outlets for his talents.
The Grand Canyon is a rich, geologic landscape formed over millions of years by a combination of natural forces.
Under certain conditions, ice crystals act as prisms that create patches of light accompanying the sun.
This powerful ocean current helps warm Western Europe, and it was instrumental in the colonization of the Americas.
The basic definition of democracy: rule by the people. But democracies can be defined as parliamentary, Jacksonian, liberal, social and other types.