"The magnetosomes are like hair: a bacterium can survive without the magnetosomes, but the magnetosomes give it advantage. Some bacteria have many more magnetosomes they need for magnetotaxis. The analogy would be having 250x more bone than needed for standing up. Hoarding magnetite chains can be used to form cytoskeleton: mineral wealth does pays off."
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.