The essence of science -- The origins of Greek science. The genius of Greek civilization ; Science before the Greeks ; The language of the universe -- Exploring the universe. The world outside. Optics ; Acoustics ; Mechanics ; Chemistry ; Geography and geology ; Meteorology ; Astronomy -- The world within. Biology ; Medicine ; Psychology -- From ancient Greece to the modern world. Greek science in Roman hands ; The transmission of Greek science to later ages -- Ancient science beyond the Mediterranean. Sky watchers of Central America ; Secrets of Stonehenge ; Science in ancient China -- The "untravell'd world" -- The Hellenic "Hall of Fame".