
The SciencesMarch 1, 1976
Polycyclic Aromatic Compounds in Nature
These multiple-ring hydrocarbon molecules have been found in soils and sediments around the world. They are unusually stable, and their origins have presented an intriguing puzzle.

Polycyclic Aromatic Compounds in Nature
These multiple-ring hydrocarbon molecules have been found in soils and sediments around the world. They are unusually stable, and their origins have presented an intriguing puzzle.