"Maple syrup is a useful way to model of the way the piling up of ice makes it flow. Pour a single small drop of syrup onto a flat plate, and it will just sit there. Try the experiment again, but this time keep pouring out the syrup, and you will find that the weight of the "pile" makes the syrup flow away from the center"
A great article is the link...
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.