|How Large is the Universe? |
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...
|Space Shuttle Disaster |
An investigation uncovers the human failures and design flaws behind the 2003 Columbia tragedy.
|To Fly or Not to Fly |
Computer graphics recreate the period 150 million years ago when small, fast-running dinosaurs evolved feathers and took to the air.
|The Problems of Parenthood |
David Attenborough looks at the fascinating diversity of feeding practices and behavioural patterns employed by birds.
|Rat Attack |
Why do huge swarms of rats overrun a bamboo forest in India once every half-century?
|Cars That Think |
The fully automatic car may be down the road a ways, but cars that do your thinking for you are just around the corner.
|Hunting the Hidden Dimension |
Mysteriously beautiful fractals are shaking up the world of mathematics and deepening our understanding of nature.
|The Spy Factory |
Examine the high-tech eavesdropping carried out by the National Security Agency and the pitfalls of surveillance in an age of terrorism.
|Easter Island |
Travel to Easter Island to discover the secrets of this vanished civilization.
|The Fluoride Deception |
Christopher Bryson, an award-winning journalist and former producer at the BBC, discusses the findings of his new book The Flouride Deception.
|Hidden Motives |
How does the unconscious mind determine human behavior?
|Marathon Challenge |
Every year thousands of athletes from across the globe flock to Boston to run the city's marathon.
|Ocean Animal Emergency |
Wildlife veterinarians struggle to save injured seals and sea lions on the California coast.
|Extreme Ice |
An acclaimed photographer teams up with scientists to document the runaway melting of arctic glaciers.
|Hunt for the Supertwister |
In seconds, a supertwister can leave immense swaths of death and destruction. What if technology could help us tame nature’s most violent tornadoes?
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