Aerospace startup Boom says they've proven quiet supersonic flight is possible with their passenger airplanes after a ...

Join us on a 41-day adventure as we build a stunning underground dragon-themed swimming pool with a water slide leading into a tunnel! This incredible project was created entirely by hand using ...

The first underwater tunnel was built with a tunnel shield. You could build a mile-long tunnel here ... to construct tunnels under water.

Tokyo Electric Power Co. announced it had abandoned plans to lay a pipeline on the seabed to discharge treated contaminated water 1 kilometer ... and would build an undersea tunnel instead.

It is a scenario South San Joaquin Irrigation District wants to avoid. A major rock or land slide on the western side of the ...