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Was wondering, is the ability of rock to generate a current when it's compressed to nearly failure is universal to all matter? If so, are there other materials -or even liquids- that can produce a higher out-put?
to stay at one kid per person.... But the church won't like it,
neither will those in poor country's, relying on lots of kids (sons) to take care of them at their old age.
It turns out that lasers can beam power from space.