An example of an extended metaphor in a scientist's writing:
"…if we take a closer look and scrutinise the edifice of exact science more intently, we must very soon become aware of the fact that it has a dangerously weak point – namely, its very foundation. Its foundation is not braced, reinforced properly, in every direction, so as to enable it to withstand external strains and stresses. In other words, exact science is not built on any principle of such universal validity, as to be fit to support the edifice properly."
Plank, Max (1947/1949). The meaning and limits of exact science (F. Gaynor, Trans.). In Scientific Autobiography and other papers (pp. 80-120). Philosophical Library.
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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.