Lady of the Yellowstone
by Mike Kennedy
Tunnel boring machines, each the size of attack submarines, are assembled beneath the planet's crust within the Madison Valley Abyss. Purdue geologists discovered the first of the lava and proposed the plan. When one or both of the tunnels connect, the Yellowstone magma chamber will drain, releasing pressure, and giving mankind a century, or an age, or an epoch in which to prepare once more.