Polycyclic Aromatic Hydrocarbons
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PAHs form from the decay of living things,
including bacteria.
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They can easily be formed in other
inorganic ways, but É
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They donŐt look like contaminants from Earth.
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They donŐt look like the kind of PAHs found in
space.
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They are more common deep in the rock than
near its surface.
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