Take a dazzling architectural journey inside the majestic marvels of Europe's greatest cathedrals.
How did medieval engineers construct magnificent skyscrapers of glass and stone?
Nothing so awe-inspiring had ever been seen in medieval Europe. Gothic cathedrals towered above the horizon with stone spires that seemed to reach heaven. But now some of these cathedrals teeter on the brink of catastrophic collapse. To save them, an international team of engineers, architects, art historians and computer scientists searches the naves, bays and bell-towers for clues to their architectural secrets.
Physicist and author Brian Greene, brings us a mind-blowing new exploration of space, time, and the very nature of reality.
Acclaimed filmmaker Ken Burns chronicles the worst man-made ecological disaster in American history.
A fresh perspective on the birth of civilisation in the Near and Middle East and its dynamic influence on the West.