In the early decades of the 19th century, London was facing a major problem. The city had become the world's busiest port, but in order to transport goods from the docks to the heavily-populated ...

This is the hardest, slowest way to dig a tunnel through a mountain. It would take you more than 80 years to dig a mile-long tunnel with hand tools!

Digging a tunnel underneath a body of water is tough going! The ground here is a gooey, soppy mess! Choose a tool or technique below, and try to figure out the best way to dig a tunnel through the ...

The rare bit of good news for the much-maligned project followed the agency's investigation into the leaks, which were revealed last September after water broke though a faulty wall panel in the ...