Every atom is like every other; Except for the isotopes, Every Caron atom, every Nitrogen atom, Every Sulfur atoms is identical.
"The chemical elements are like nature's building blocks. The chemical elements are the building blocks of all substances."
Or maybe a Lego set with 118 different types of pieces.......
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.