Seriously how the fuck do they know where the good stuff is going to be, especially back before ground penetrating radar?
In: Other
My mom’s friend does this. It’s kind of like how if you yell at a wall you can tell if you’re in a bathroom or against a steel building or a bunch of pillows based on the sound you hear back.
They have big machines that do that and use computers to listen and figure out what the sounds mean.
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