Add Yahoo as a preferred source to see more of our stories on Google. 00 longest tunnels opener laerda Tunnels are used to carry traffic through some of the most extreme terrain on the planet and they ...

Traffic passes along the busy A303 that currently runs besides the ancient neolithic monument of Stonehenge near Amesbury, Wiltshire, England. (Photo by Matt Cardy/Getty Images) The U.K. government ...

Traveling through tunnels is usually just a normal part of a trip, but the Laerdal Tunnel in Norway is something special. The ...

When seawater penetrates concrete in road tunnels, a biofilm is formed that breaks down the concrete. This can lead to high costs and the risk of damage if stone and concrete drop from the tunnel roof ...

Penetrating seawater carries bacteria that form colonies – biofilm. The bacteria attack the concrete that is supposed to prevent stones from loosening from the tunnel walls. The concrete becomes ...