Wartime tunnels opened to public bbc.co.uk Take a look at an interesting article we found.
Huge tunnel to be built under San Francisco Bay mercurynews.com Take a look at an interesting article we found.
Mullan Tunnel reopened to train traffic kxmc.com Take a look at an interesting article we found.
Finally, ugly fruits and vegetables are getting the respect they deserve.
August 17, 2009
The printing press. Splitting the atom. Velcro.
A testimony to Man's imagination and sticktoitiveness.
I would put an underwater tunnel right up there. Or should we say down there.
Actually, I've never gotten used to the mindboggling notion that I'm traveling far below the surface of the water — probably to the point of being tiresome about it.
Now build a tunnel that has about 24 of its 32 miles, 150 feet below the seabed, and you've got a right to be the Eighth Wonder of the World.
The Channel Tunnel, Chunnel or Le tunnel sous la Manche, linking the two countries together, is not a new concept.
Tunneling schemes date back to at least 1715 across what Shakespeare termed, “Our National Moat.”
Napoleon's 1802 pipe dream to build a tunnel beneath the English Channel called for ventilation from chimneys, which protruded above the water's surface.
In ancient times, Roman engineers created the most extensive network of tunnels in the world. Between various conquering escapades they found time to build aqueducts to carry water from mountain springs to serve their ever expanding thirsty empire.
Now, of course, tunnels hold more than water.
Today, we have computer aided tunnel-boring machines. In the Chunnel’s case, there were 11 of them (TBMs) that would chew through the sea floor.
In essence, three English TBMs raced against the three French TBMs to see who would meet in the middle first.
England got there slightly ahead of France, who presumably brought the Dom Pérignon, in a made for TV moment replete with an underwater handshake.
Those five other TBMs, in case you’re counting, were creating the portion of the tunnel on land.
Well, somehow it all worked.
Thirteen thousand engineers, technicians and workers later, the vision was complete in 1994.
Today, trains roar through the tunnel at speeds up to 100 miles per hour; it's possible to get from one end to the other in 20 minutes, the fastest way to get from London to Paris.
As Mr. Einstein said, “If at first, the idea is not absurd, then there is no hope for it.”
So...if you have any "absurd" ideas for bringing people closer together, we can probably use them.
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The World's longest Railway Tunnels lotsberg.net Take a look at an interesting article we found.
Complete Listing of World Wonders wonderclub.com Take a look at an interesting article we found.
Roman Aqueducts inforoma.it Take a look at an interesting article we found.
Most awesome engineering feat of the modern world?