1983
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- OverviewJan 27-Dec 29, 200917 episodesEpisodes17. What Darwin Never Knew Dec 29, 2009
- Science breakthroughs link the mystery of origins to the development of the embryo.
- 16. What Are Dreams? Nov 24, 2009
- Dream researchers investigate the world of sleep, from human narcolepsy to sleepwalking cats.
- 15. Becoming Human: Last Human Standing Nov 17, 2009
- Evidence reveals new insights into how humans became creative and modern; demise of Neanderthals.
- 14. Becoming Human: Birth of Humanity Nov 10, 2009
- How ancestors survived in a savannah with vicious predators.
- 13. Becoming Human: First Steps Nov 3, 2009
- Clues about early ancestors in Africa include a complete fossil named Lucy's Child.
- 12. Lizard Kings Oct 20, 2009
- Dr. Eric Pianka tracks monitor lizards through Australia's heartland.
- 11. Hubble's Amazing Rescue Oct 13, 2009
- NASA sends a shuttle crew to service the Hubble Space Telescope.
- 10. Darwin's Darkest Hour Oct 6, 2009
- Charles Darwin must decide whether to make his theory of evolution public.
- 9. Musical Minds Jun 30, 2009
- Dr. Oliver Sacks investigates how music affects the brain.
- 8. The Quest to See Infinity Apr 21, 2009
- Documentaries focus on science, the natural world, history and research.
- 7. Doctors' Diaries Apr 14, 2009
- An update on the seven doctors first profiled in 1987 as they began Harvard Medical School.
- 6. Doctors' Diaries Apr 7, 2009
- An update continues profiles on seven doctors who began Harvard Medical School in 1987.
- 5. Megabeasts' Sudden Death Mar 31, 2009
- A new theory about what killed off America's mammoths.
- 4. Extreme Ice Mar 24, 2009
- Cameras in the Arctic, Alaska and the Alps record melting glaciers.
- 3. Rat Attack Feb 24, 2009
- Bloom of bamboo in Mizoram spurs an explosion in rat population.
- 2. The Spy Factory Feb 3, 2009
- National Security Agency's hunt for information in the war on terror.
- 1. The Incredible Journey of the Butterflies Jan 27, 2009
- The secret world of the monarch butterfly.