"Identical twins are like a piece of music played by two different pianists - each rendition is unique, but you can always tell it's Tchaikovsky."
"It is said that identical twins are like "two drops of water" but in physics, it is known that water molecules even if with the same chemical composition differ in configuration because of atoms' motion."
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.