An historical example of metaphor:
"…syphilis… which is the consequence of contagious and leprous affections of the genitals, is a daughter of leprosy and can in certain circumstances in turn become the mother of leprosy."
Friedrich Alexander Simon
Friedrich Alexander Simon (1793- 1869, German physician) quoted in Fleck, L. (1979). Genesis and Development of a Scientific Fact [Entstehung und Entwicklung einer wissenschaftlichen Tatsache. Einführung in die Lehre vom Denkstil und Denkkollektiv] (F. Bradley & T. J. Trenn, Trans.; T. J. Trenn & R. K. Merton, Eds.). The University of Chicago Press. (1935)
Read about metaphor in science
Read about examples of science metaphors
Many examples of science metaphors are listed in 'Creative comparisons: Making science familiar through language. An illustrative catalogue of figurative comparisons and analogies for science concepts'. Free Download.