relative dating
"Relative dating is like looking at a multi-layered cake. The base layer must come first, then the second and then the third. So I can say the second layer is younger than the first and older than the third but I have no idea whether the cake is 5 minutes or 5 million years old. Relative dating is used commonly when looking at the relative order of geological event"
"Relative dating is like the pile of papers on my desk. The youngest stuff is on top of the pile and the oldest stuff in on the bottom"
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.