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— Lewis Thomas"All of today's DNA, strung through all the cells of the earth, is simply an extension and elaboration of [the] first molecule."
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The cell, this elementary keystone of living nature, is far from being a peculiar chemical giant molecule or even a living protein and as such is not likely to fall prey to the field of an advanced chemistry. The cell is itself an organism, constituted of many small units of life.
— Oscar Hertwig
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The cell is immortal. It is merely the fluid in which it floats that degenerates. Renew this fluid at regular intervals, give the cells what they require for nutrition, and as far as we know, the pulsation of life can go on forever.
— Alexis Carrel
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