Space The Elegant Universe (Hour 2)  47:00 Eleven dimensions, parallel universes, and a world made out of strings. Space Shuttle Disaster  50:00 An investigation uncovers the human failures and design flaws behind the 2003 Columbia tragedy. The Search For Earth-Like Planets  21:29 The search for Earth-like planets is reaching a fever-pitch. Is the galaxy filled with life, or is Earth just a beautiful, lonely aberration?	Nature The Demands of the Egg  49:18 David Attenborough explores the extraordinary variety of ways in which birds from all over the world construct their nests and protect their eggs... Going Deep  26:00 A look back at the decades of effort that culminated in the deep sub Alvin reaching the ocean floor, and a look forward to what's next now Alvin's... Fellowship of the Whales  50:38 Follow a baby humpback whale as she travels from her birthplace in Hawaii, to feeding grounds off Alaska’s coast.
Science & Technology Cars That Think  26:00 The fully automatic car may be down the road a ways, but cars that do your thinking for you are just around the corner. The Big Energy Gamble  50:00 Can California's ambitious plan to cut greenhouse gases actually succeed? Robot Pals  26:00 To be really useful, robots need to behave as cooperative partners rather than mindless machines.	History Missing in MiG Alley  49:00 What happened to American pilots shot down over Korea half a century ago? Easter Island  54:22 Travel to Easter Island to discover the secrets of this vanished civilization. Lost Treasures of Tibet  50:00 A crack restoration team tries to prevent priceless medieval Buddhist murals from crumbling into dust.
Health The Fluoride Deception  28:31 Christopher Bryson, an award-winning journalist and former producer at the BBC, discusses the findings of his new book The Flouride Deception. The Future Of Food  1:28:54 The Future Of Food offers an in-depth investigation into the disturbing truth behind engineered foods that have quietly filled U.S. grocery store... Cancer Warrior  52:00 Judah Folkman and other researchers pioneer a novel approach to cancer treatment.	Environment Extreme Ice  50:00 An acclaimed photographer teams up with scientists to document the runaway melting of arctic glaciers. Hunt for the Supertwister  52:46 In seconds, a supertwister can leave immense swaths of death and destruction. What if technology could help us tame nature’s most violent tornadoes? Hot Planet - Cold Comfort  26:00 So you think global warming won't affect you?