Help! The metaphor of "snowballing" -- starting with one paper and adding more papers to your "read this soon" pile, because they have citation relationships or they use the same dataset or they come from the same theme issue or they are by the same senior author's lab or whatever -- is there a similar metaphor that would work well in a tropical climate, where people have possibly never had the experience of rolling a snowball around until it's gigantic? #English #metaphor