History is not just the people on top of the Earth, but what we do below it as well. And Big Bertha: How a Massive Tunnel Boring Machine Dug a Highway Under Seattle does a fantastic job of showing us both. But especially below. When the earthquake hit, damages were numerous, and the city had to find a way to stop the highway from collapsing again. It would take several years to find a way, but between the different sciences and global assistance, the drill […]