Belmont Club

By Richard Fernandez

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“Do you hear the grasshopper”

January 16, 2009 - 12:34 pm - by Richard Fernandez
Ruby
2009-01-16 18:12:34

Roderick, you need to set off charges and record the sound in many different places. Sound travels faster in solid ground than in air, and tunnels are air. This plus some fancy computer work will give you a seismic map of the tunnel network. But radar is useless. Microwaves do not penetrate rock or water.