Tamara Davis’s cover article (paywall) in the latest issue of Scientific American is about the old puzzle of whether it makes sense to talk about energy conservation in the expanding Universe. It has the good taste to refer to my work with David Hogg on the nature of the redshift, which is at the heart of this question. In fact, one of the figures in the article is essentially a slick, nice-looking version of something from our paper:
I think the article’s very good. I think it gets the science right and emphasizes pretty much the right things.