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Episode guide

Horizon: 1991

23 episodes · first aired Jan 7, 1991

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  1. 1 Sudden Death Jan 7, 1991 · 1h Documentary considering the nature of sudden death, the effects of coronary heart disease and the part they play.
  2. 2 Keen as Mustard Jan 14, 1991 · 1h This Horizon episode tells the story of the top secret experiments carried out to test the effects of mustard gas.
  3. 3 Smokers Can Harm Your Health Jan 21, 1991 · 1h Horizon investigates the case against passive smoking and reveals new evidence of its danger.
  4. 4 Coming In from the Cold Jan 28, 1991 · 1h Horizon reports on the new arms verification industry emerging due to the new arms control treaties.
  5. 5 Small Problems with the Mirror Feb 4, 1991 · 1h Horizon follows astronomer's efforts to rescue the Hubble space telescope and restore its original planned performance.
  6. 6 Two Weeks to Save the Earth Feb 10, 1991 · 1h Looks at the work of Earthwatch, and some of the many people who spend their holidays contributing to learning about the planet by helping on prehistoric digs, recording fish noises…
  7. 7 California Dreaming Feb 11, 1991 · 1h This Horizon documentary presents the US auto industry's response to clean-up the air in Los Angeles, California by the year 2007.
  8. 8 The Day the Earth Melted Feb 25, 1991 · 1h This episode of Horizon examines 20 years of research which has led to a new theory on how the earth's crust was made.
  9. 9 The Curse of Karash Feb 25, 1991 · 1h Looks at the phenomenon of the outbreaks of a lethal kidney disease amongst groups of people scattered around an area of the Balkans, covering Yugoslavia, Romania and Bulgaria, over the…
  10. 10 Playing at Noah Mar 4, 1991 · 1h This Horizon interview presents Dr. Ulysses Seal who believes the "frozen zoo" concept is the best way to save vanishing species for the future generations.
  11. 11 Cashing in on Paradise Mar 11, 1991 · 1h This Horizon episode considers the pros and cons of "ecotourism" and the effects of tourism on the environment. The coral reefs of areas of Belize are suffering already from the effects…
  12. 12 The Terracotta Time Machine Mar 18, 1991 · 1h This episode of Horizon explores the Natural History Museum and its philosophy, both past and present. We look at some of the recent innovations that have been introduced in the past few…
  13. 13 Measuring the Roof of the World Mar 25, 1991 · 1h Horizon examines the problems and cartography involved in mapping mountains such as Mount Everest. They follow the history of of mapping from those surveys conducted by mountaineering…
  14. 14 The First Americans Apr 15, 1991 · 1h Horizon looks at archaeologist's new theories surrounding the population of the New World over 11,000 years ago
  15. 15 Inside Chernobyl's Sarcophagus Apr 22, 1991 · 1h Documentary following the clean-up operation at Chernobyl and the elite team of Soviet scientists working in areas of radiation that would be considered lethal in the West, whilst they…
  16. 16 Colonising Cyberspace Apr 29, 1991 · 1h Horizon presents a documentary on how virtual reality can make humans feel as if they are present in the computer simulated artificial world. What is the future of all this powerful…
  17. 17 Emerging Viruses May 13, 1991 · 1h In this report, Horizon follows a group of eminent scientists who believe we have become too complacent about infectious diseases.
  18. 18 Camelford - A Bitter Aftertaste May 20, 1991 · 1h Horizon explores the Camelford disaster, in which aluminium sulphate was accidentally added to drinking water in Cornwall in 1988.
  19. 19 Of Big Bangs, Stick Men and Galactic Holes Jun 3, 1991 · 1h Several astronomers and scientists explore the concepts of "hot/cold dark space" and whether or not the "Big Bang" theory is actually correct, as well as considering the structures of…
  20. 20 Food For Thought Jun 10, 1991 · 1h This story by Horizon looks at the expanding and controversial area of "smart drugs".
  21. 21 The Long Road to the West Jun 17, 1991 · 1h In this Horizon episode, we look at the problems facing the Carl Zeiss optics company of Jena and other companies in the scientific sector of the former Eastern block countries. Following…
  22. 22 Half Hearted About Semi-Skimmed Jun 24, 1991 · 1h Horizon examines the social and scientific issues around the cholesterol debate.
  23. 23 T-Rex Exposed Jul 1, 1991 · 1h Considers some of the different theories surrounding the Tyrannosaurus Rex dinosaur, and other members of the same family, and shows how calculations about size, speed, weight, etc. are…