Quotation by Cyril Ponnamperuma

We can come up with a working definition of life, which is what we did for the Viking mission to Mars. We said we could think in terms of a large molecule made up of carbon compounds that can replicate, or make copies of itself, and metabolize food and energy. So that's the thought: macrocolecule, metabolism, replication.
Cyril Ponnamperuma (b. 1923), Sri Lankan N U.S. scientist. The Omni Interviews, "Seeds of Life," Ticknor & Fields (1984).
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