Who were the people that built the first cities -- complete with apartment blocks -- in North America? They were the Anasazi Indians, who lived in the Southwest for some eight or nine thousand years and who then, in about 1300 AD, abruptly abandoned their cities and apparently disappeared. NOVA traces the steps of this ancient sophisticated culture.
Nuclear fusion offers the promises of an unlimited, clean source of energy. But achieving fusion has proved one of the most difficult and elusive goals of the physicist. NOVA tells the story of the twists and turns and the international competition along the road toward the achievement of fusion; and details the recent breakthroughs which seem at last to have brought it within reach.
When Paul Kammerer committed suicide in 1926, it was taken by most of his fellow biologists as a tacit admission of guilt that he had faked his experiments purporting to show the inheritance of acquired characteristics. Arthur Koestler joins NOVA in an in-depth examination of Kammerer's infamous experiment.
The advance of medicine depends inevitably on the testing of experimental procedures on human volunteers from either the healthy or the sick. Yet such procedures are often dangerous, and may not be of direct benefit to the subject. NOVA examines how individuals' interests are safeguarded, and asks, under what circumstances experiments should be conducted on children.
Birds migrate in search of perpetual summer, sometimes traveling as much as 20,000 miles every year. NOVA uses radar to track and identify migrating birds that travel at night, focusing on how they coose routes tat avoid bad weather and make the best of prevailing winds—information that can aid meteorologists.
NOVA explores the mighty Colorado River which today has become the life-blood of the Southwest, providing water and electricity to the farms and cities of California, Nevada, and Arizona. The program examines the political expediency and technological over-optimism that has led to some major miscalculations of the river's capacity.