Four More DNA Bases?

As technology allows us to delve ever deeper into the inner workings of the cell, we continue to find layer-upon-layer of complexity. DNA, in particular, is an incredibly complex information-bearing molecule that bears the hallmarks of design.

The individual nucleotides that make up DNA are strung together in a particular order to code for particular functions. The characteristics of DNA are analogous to those of a written language with a four-letter alphabet of A, C, T, and G (or...