Recent research suggests that liberals and conservatives differ, in a measurable way, in brain structure and function. Yeah. Think about that. This work is far from phrenology, but interpreting its meaning is difficult and contentious. And indeed, given the massively controversial nature of this research, how can science bloggers contribute measure and sanity to the discussion of it? What caveats are necessary? What declarations are supportable? For it is not like this work is going away. Rather, we can expect more and more of these types of studies—of political phenotypes, of bio-politics—to emerge.