California schoolboys Bill and Ted learn that they will fail their history exam unless they give a presentation on "The modern world through the eyes of a prominent historical figure." Fate brings them together with

Visit the ghostly villages surrounding Chernobyl (abandoned by humans after the 1986 nuclear disaster), travel to remote islands off the coast of Maine to search for abandoned towns that have vanished from view in only a few

Over the past half century, humans have penetrated the stratosphere, traveled to the Moon, and lived permanently in orbit. In the coming decades, our unquenchable curiosity will take our species beyond Earth's cradle to