Horizon presents a documentary on the ideas of Maureen Raymo's thesis on what triggered the last ice age.

This episode of Horizon explores collections of the bones of thousands of Native American Indians in museums and universities across the United States.

Horizon presents the story of a pair of Siamese twins and the surgery they underwent to try and separate them.

Horizon investigates whether the human growth hormone is really the new wonder drug of the 21st century.

Horizon brings you the recent discovery of the real Venus as space probes, like the Magellan, shattered previous existing concerning its geology.

Horizon follows the a six month study of the world's first Environmental Impact Assessment team as they study the implications for the environment for major environmental events such as in Tanzania, when in April last year, nearly half a million people set up home in the refugee camp of Benaco.

Horizon has uncovered disturbing evidence of the fabrication of scientific research results.

This Horizon episode is about the Earth as an icon.

Horizon presents this documentary on how national power is moving into the hands of those who control information.

This episode of Horizon reveals the results of research that could explain the major reasons for so many complications during pregnancy.

Horizon tries to answer the question, "Has the dream of earthquake prediction finally been shattered?"

Horizon explores the phenomenon often regarded as the first sign of madness - hearing voices. The report describes how the work of a leading Dutch professor of psychiatry, Marius Romme, has influenced psychologists and psychiatrists in Britain to rethink their current definitions of madness.

Horizon presents a documentary that reveals the role played by deception in society and the effort by science to weed out the truth and the controversy over the accuracy of the polygraph test.

Horizon investigates the controversial research into some birth control contraceptives.

This episode of Horizon is about the future of micro-technology. In 1959, noted American physicist Richard Feynman offered a $1000 prize to anyone who could build an electronic motor no larger than half a millimetre on any side. He awarded the prize within eight months. Today, some scientists predict the imminent development of molecular computers the size of specks of dust. This program examines that and other technical possibilities, as it takes viewers on a guided tour of the cutting-edge laboratories of nanotechnology. There, scientists working on similarly astounding projects offer their predictions about future technological developments. Discussions include how nature provides scientific inspiration. Detailed scientific models and sophisticated computer graphics illustrate how these new micro-technologies will work.

Horizon presents an update on the story about asteroids colliding with Earth some day.

Horizon looks at an attempt to crack the mystery of smell by designing a molecule whose odour can be detected.

This report by Horizon brings you the latest research into the battle agains the AIDS virus.

Horizon presents the story of the search for an explanation of how rock can flow like water.