Describes the building of the Pantheon, discussing the role of the Roman emperor Hadrian and the significance of the Pantheon in the fields of history and architecture.

Describes the physical characteristics, diet, natural habitat, and life cycle of these large wading birds, and tells about the efforts of scientists to establish resident flocks.

A history of the building of the Panama Canal, with emphasis on the difficulties of digging a canal where some engineers said it could not be done.