An example of metaphor in public science discourse:
"some of these invasive alien species are incredible hitchhikers, and they will hop onto the kayak, and this is both the little tiny invertebrates like little shrimps, but also plants as well…"
Professor Helen Roy
Professor Helen Roy (UK Centre for Ecology & Hydrology) was talking to Gaia Vince during an episode ('What's the cost of invasive species?') of BBC Inside Science.
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.