Something called “The Object” stops world’s largest tunneling machine

Bertha, the world’s largest tunneling machine, churning through the rock and mud beneath Seattle, has hit a mysterious roadblock—so mysterious, it is only known for now as “the object.”
The New York Times reports that the machine—300 feet long and 5 stories tall—has ground to a halt. Built precisely not to be stopped by, well, just about anything, Bertha … Read More → "Something called “The Object” stops world’s largest tunneling machine"





