Because it isn’t official without one.
Joshua Rosenau spends his days defending the teaching of evolution at the National Center for Science Education. He is formerly a doctoral candidate at the University of Kansas, in the department of Ecology and Evolutionary Biology. When not battling creationists or modeling species ranges, he writes about developments in progressive politics and the sciences.
The opinions expressed here are his own, do not reflect the official position of NCSE. Indeed, older posts may no longer reflect his own official position.