An example of an idiom used in popular science writing:
"The normal range of repeats in both the Fragile X and Freidreich's ataxia genes is found in all human populations, and has been retained through human evolution. If these regions were completely nonsensical we would expect them to have changed randomly over time, but they haven't. This suggests that the normal repeats have some function.
But the real grit in the genetic oyster comes from myotonic dystrophy… myotonic dystrophy expansion gets bigger as it passes down the generation."
Nessa Carey (2015) Junk DNA. A journey through the dark matter of the genome. London: Icon Books Ltd.
Read about communicating science through idioms
