Describes the uses of the sun's energy from the time of the Greeks and Romans to the present day and discusses the potential of this source of energy in our modern world.
Explores the question of whether life exists in outer space, and looks at how technology is helping scientists learn more about the possibility of extraterrestrial life.
Takes a look into what caused the extinction of dinosaurs on the earth and examines theories of some scientists including comets, meteors, and asteroids.