Check out our paper analyzing the genomic basis of parallel speciation in stick insects (Timema cristinae) that was just published in Science. We even made the cover! Science also published a related news piece discussing how our study sheds new light on the predictability of evolution. In this study we show that the repeated evolution of reproductive isolation between stick insects on different host plants involved parallel genetic differentiation at only a modest proportion of the genome, and thus genome divergence was mostly idiosyncratic. But, genetic regions that exhibit parallel divergence contain an excess of genes with specific functions, and are likely of central importance for speciation.