Issue 1 - GLACIERS - CLUES TO OUR PAST
Glaciers are what remain of the vast sheets of ice that covered one-third of the globe during the last ice age. Dynamic and powerful, they continue to carve and shape the land. Animation and time-lapse photography explain the conditions that through the eons have periodically enveloped the planet in ice, and how glaciers grow and move. We show some spectacular results of their movement, and follow scientists onto the Mendenhall Glacier, where they interpret frozen clues to our planet's past and predict its future. - 14 Minutes

Issue 2 - OUR CHANGING PLANET
Volcanoes, earthquakes, geysers, and boiling mud are awesome testimony to the powerful forces constantly churning beneath, and changing, our planet's surface. This issue features volcano footage, and goes underground to reveal why volcanoes erupt. Graphics illustrate the theory of continental drift, how Earth's landmasses may have looked millions of years ago, and how continents could look far into the future. - 13 Minutes

Issue 3 - THE WORLD BELOW
See how geologists are using technology to learn about our planet by studying its crust. This issue explains continental drifts, the forces that move continental plates, how ocean floors and mountain ranges were formed, causes of earthquakes and volcanic explosions, and the theory that earth's magnetic field is produced by storms within a sea of molten lava at the earth's core. - 15 Minutes

Issue 4 - CONSERVING OUR PRECIOUS MINERALS
Modern civilization has been built upon the use of earth's mineral resources. Exploring the ways minerals touch our lives everyday, this issue surveys the sources and uses of some of the minerals which have become most important to us. Students will also see efforts to conserve and find suitable substitutes for these indispensable, non-renewable, natural resources. - 11 Minutes