human genetic diversity
"Human genetic diversity is like a color spectrum; it exists, but there's no clear dividing line between one "race" or another, and so the divisions we create are socially constructed, just like our color categories."
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.