By Burkhard Bilger
Issue: Sept 15
This article was so friggin cool. Giant machines, dirt, rocks, getting stuck in tunnels... what more do you want?
Apparently, digging two enormous tunnels from Germany to Switzerland through a mountain isn't that easy. But with the right planning and equipment, teams tunneling in from each end might be able to meet each other in the middle only a few feet askew, as happened in an earlier tunneling project.
Martin Herrenknecht builds crazy tunneling machines used all over the world and looks forward to tunneling near you. Watch for him in your backyard.
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