What are compounds?

Famous quotes containing the word compounds:

    “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)