"So we don't know which one will be fixed. We do know how many will be fixed. So this is why the molecular clock is like an atomic clock; it's driven by radioactive decay. We don't know how many atoms--we don't know which atom will decay, but in a second we know how many will, for a given radioactive substance."
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.