Space How Large is the Universe?  20:13 The universe has long captivated us with its immense scales of distance and time. How far does it stretch? Where does it end and what lies beyond its... Supermassive Black Hole in the Milky Way   20:08 From a distance, our galaxy would look like a flat spiral, some 100,000 light years across, with pockets of gas, clouds of dust, and about 400... Sputnik Declassified  49:00 Top-secret documents rewrite the history of the famous satellite and the early space race.	Nature The Eloquent Communicators  49:27 David Attenborough reveals how birds have become expert communicators and use extraordinary patterns of colour and beautiful songs to deter... To Fly or Not to Fly  49:18 Computer graphics recreate the period 150 million years ago when small, fast-running dinosaurs evolved feathers and took to the air. 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 Robot Pals  26:00 To be really useful, robots need to behave as cooperative partners rather than mindless machines. Car of the Future  50:00 Join the 'Car Talk' guys as they hit the road in search of a new breed of clean, fuel-efficient vehicles. The Big Energy Gamble  50:00 Can California's ambitious plan to cut greenhouse gases actually succeed?	History The Spy Factory  50:00 Examine the high-tech eavesdropping carried out by the National Security Agency and the pitfalls of surveillance in an age of terrorism. Ancient Refuge in the Holy Land  54:17 Armed with high-tech equipment and ingeniously improvised devices, NOVA and archaeologist Richard Freund embark on a fascinating detective story that... Lost Treasures of Tibet  50:00 A crack restoration team tries to prevent priceless medieval Buddhist murals from crumbling into dust.
Health 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... Surgical Slimmers  26:00 In spite of the risks, people are lining up to solve their weight problems in the operating room. Marathon Challenge  52:45 Every year thousands of athletes from across the globe flock to Boston to run the city's marathon.	Environment 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? Extreme Ice  50:00 An acclaimed photographer teams up with scientists to document the runaway melting of arctic glaciers. Hot Planet - Cold Comfort  26:00 So you think global warming won't affect you?