Tokyo's Sky City- It would house 35,000 residents and host 100,000 daily workers, students and visitors. This space-age city in the sky might seem like science fiction, but it answers some questions about where humans might live as our most crowded cities become even more densely populated.

by:

jay21157

views:

21,170

added:

12 mos ago

language:

English

Subways in America- How do you overhaul one of the nation's oldest and most traveled subway systems without shutting down a city for several years? New Yorkers are finding out.

by:

jay21157

views:

10,813

added:

12 mos ago

language:

English

Transatlantic Tunnel- So, if you could take the train from New York and in less than an hour reach London, would you do it? What if you had to make the journey through a tunnel 150 feet under the Atlantic? And on a magnetically levitated train traveling at 5,000 mph?

by:

jay21157

views:

14,663

added:

12 mos ago

language:

English

City in a Pyramid- Imagine a self-sustaining pyramid-shaped city in the air. And imagine that it is built by robots and with little help from human workers.

by:

jay21157

views:

9,000

added:

12 mos ago

language:

English

Bridging the Bering Strait- For the first time since the ice age, there could be a bridge across the Bering Strait linking Asia and North America. First, engineers must learn to deal with 55 miles of violent seas and crushing ice over the Arctic Ocean.

by:

jay21157

views:

8,229

added:

12 mos ago

language:

English

Tunneling Under the Alps- How might Europe be different if the great land barrier of the Alps could easily be traversed via tunnels?

by:

jay21157

views:

6,066

added:

12 mos ago

language:

English

Building Hong Kong's Airport- In the 1990s, Hong Kong undertook one of the largest civil engineering projects in history when it decided to build a new international airport 16 miles out to sea.

by:

jay21157

views:

12,907

added:

12 mos ago

language:

English

Holland's Barriers to the Sea- Most of Holland is below sea level, the nation a drainage basin for three major rivers. Its people have fought back against floods since the Middle Ages. But now, they have massive, computer-controlled sea barriers and dams doing the trick.

by:

jay21157

views:

7,131

added:

12 mos ago

language:

English

Boston's Big Dig- How do you put a new, 10-lane highway 120 feet below downtown Boston without succumbing to crumbling earth, and without endangering the buildings and people above? It's happening right now.

by:

jay21157

views:

7,940

added:

12 mos ago

language:

English

Widening the Panama Canal- For nearly a century, one of the world's most important waterways has let ships make a commercially critical shortcut between the Atlantic and Pacific oceans. But many of today's ships are too big for the man-made canal. Can it be widened?

by:

jay21157

views:

5,871

added:

12 mos ago

language:

English