While the links between the study of rocks and fossils and the high-tech field of genetics are not necessarily obvious at first glance, a recent review in the Journal of Vertebrate Paleontology shows that the connection is perhaps closer than you. often think. The case studies illustrate how the understanding of paleontology can be supported by research from developmental biologists. One case study looks at the relatively small genetic changes that have led to dramatic differences, for example the steps from a four-legged ancestor to a dolphin with two forelimbs and a tail, or a snake with no limbs at all, supported by paleontological findings of transitional fossils that bridge the gaps. Fascinating article and review. click on the image or title to learn more.