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However, this notion changed dramatically over time, especially after the invention of the telescope.This program traces the development of astronomical theory with discussions of the discoveries of Copernicus, Galileo, Kepler, and Newton.
Various groups and agencies are studying the San Andreas Fault and the damage caused along its path to better understand how earthquakes ravage the land. This program discusses where oil comes from, how it is extracted, and how it is converted into energy.
Faults, waves, and the transfer of energy from the epicenter are explained, and histories of the seismograph and Richter scale are presented.
The program also describes devices being developed to study and eventually predict earthquakes. Geologic Time To illustrate the immensity of geologic time, the entire span of Earth's existence is compressed down to a year.
Images of landscapes illustrate how wind creates features such as dunes, playas, blow-outs, and even oases. Glaciers Many of the world's most beautiful landscapes were made by glaciers.
This program shows how, explaining glacial formation, structure, movement, and methods of gouging and accumulating earth.