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Microscopic membrane vesicles can assemble from amphiphilic compounds isolated from the Murchison carbonaceous meteorite. The compounds are at least 4.5 billion years old, the age of the Earth, and probably older because they were present in the molecular cloud that gave rise to our sun and solar system. The vesicles are fluorescent because they contain polycyclic hydrocarbons like pyrene and fluoranthene. The bar indicates 20 micrometers.
