The planets, exploring the solar system

By Roy A. Gallant

Discusses the planets, moons, sun, asteroids, meteoroids, and comets of the solar system, their features and movements, and man's exploration of them.

Explorers of the atom

By Roy A. Gallant

Traces the development of the atomic theory and discusses the various uses and misuses of atomic energy.

Earth's changing climate

By Roy A. Gallant

Discusses climate and explores reasons for changes in climate, including sunspots, cosmic dust clouds, and man-made factors. Analyzes the economic, social, and political effects of these changes.

Fires in the sky

By Roy A. Gallant

Discusses the characteristics of stars using the sun as an example, examining the composition of the sun, various theories about its energy production, differences among stars, and the birth and de...

The planets, exploring the solar system

By Roy A. Gallant

Discusses the planets, moons, suns, asteroids, meteoroids, and comets of the solar system, their features and movements, and man's exploration of them.

How life began

By Roy A. Gallant

Surveys various myths and scientific hypotheses concerning the origin of the physical universe and of life on the planet Earth.

Early Humans

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The ever changing atom

By Roy A. Gallant

Introduces atoms, the tiny particles which make up everything in the world, discussing their different parts, how they were discovered, and how they can be used as a source of energy.

Dance of the continents

By Roy A. Gallant

Describes the development of geological theory from the ancient Greek philosophers to the discovery of plate tectonics, which explains the forming of geological structures.

Earth s Place in Space

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