If..

By David J. Smith

Subjects: Juvenile literature, World history, juvenile literature, Astronomy, Astronomy, juvenile literature, Causes, World history, Natural resources, juvenile literature, Population, Population, juvenile literature, Natural history, Natural resources, History

Description: Compares large, complicated numerical concepts with smaller-scale facsimiles to examine such statistics as the size of the Milky Way, the history of human population, and the history of Earth.