PETER MENZEL / SCIENCE PHOTO LIBRARY PETER MENZEL / SCIENCE PHOTO LIBRARY
Walter Gilbert, Harvard University Nobel laureate scientist, appears next to a computer graphics representation of the DNA molecule in this double- exposure photograph. Gilbert is a leading proponent of the human genome project, an ambitious plan to build a complete, detailed biochemical document of every gene expressed on each of the 23 pairs of human chromosomes. Photographed May 1989.
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