A battered manuscript turns up after 1000 years revealing the mind of the Greek genius Archimedes

Forensic experts investigate the most famous aviation mystery of World War 1.

An introduction to string theory and its unification of general relativity and quantum mechanics.

In order to solve some of the deepest mysteries of the universe, the rules that govern large objects like galaxies must be combined with the rules that govern small objects like subatomic particles.

String theory is radically changing our ideas about the nature of space, opening up the possibility that extra dimensions, rips in the fabric of space, and parallel universes actually exist.

Relive the engineering challenges that two bicycle makers overcame to become the first in flight.

Is the magnetic field protecting Earth from deadly radiation about to reverse direction or even dissapear?

Join a scientific expedition to the glacier-capped summit of Kilimanjaro, Africa's tallest mountain.

NASA gambles on two rovers sent to determine if the red planet ever had conditions suitable for life.

Rare lemurs and crocodiles with bizarre cave-dwelling behavior draw scientists to a remote corner of Madagascar.

NOVA goes beyond the wagging tails and floppy ears to reveal surprising insights into the origin and evolutionary strategy of our canine companions. From a wolf research facility in rural Indiana to New York's Westminster Dog Show, you'll discover some amazing dog facts. Did you know the Saluki can beat any other mammal on earth in a three-mile race? That dogs developed spots for a specific reason? And that their evolution is helping us learn about our own?

A team of "glacionauts" verntures into a labyrinth of unexplored and hazardous glacier caves on France's Mt. Blanc.

One of the most exhaustive investigations in aviation history reveals telling clues to the cause of a dissaster off Nova Scotia.

An American mobile hospital mobilized in Iraq faces a daily drama of war-time treatment.

Scientists, meteorologists and storm chasers try to uncover the secrets of F5 tornadoes, the largest, most powerful and most dangerous on Earth. Included are looks at how funnels form and the devastating 2003 tornado in Moore, Oklahoma, plus "tornado tourists", who pay companies to take them to the ferocious phenomena to see them first-hand.

NOVA investigates forces that are radically changing populations in both rich and poor nations, and explores how to create a world that can sustain the human race.

Nova investigates the impact of forces that are radically changing populations in both rich and poor nations.

Can the U.S. military's high-tech weaponry prevail against insurgents?