An example of an extended metaphor used by a scientist:
"The law of causality is neither true nor false. It is rather a heuristic principle, a signpost – and in my opinion, our most valuable signpost – to help us find our bearings in a bewildering maze of occurrences, and to show us the direction in which scientific research must advance in order to achieve fertile results."
Max Planck
Plank, M. (1948). The concept of causality in physics (F. Gaynor, Trans.). In Scientific Autobiography and other papers (pp. 121-150). Philosophical Library.
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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.