Describes the physical characteristics and behavior of dinosaurs and environment in which they lived. Includes four two-page spreads with acetate overlays.
Contains a survey of space, illustrated with photography of planets, astronomical discoveries, and both human and robotic space explorations. Transparent acetate spreads reveal details not normally visible to the naked eye.
Describes the people, places, and events of Ancient Rome, from the early days of the Republic through the High Empire period and beyond. Includes four two-page spreads with acetate overlays.