Many evolutionists claim that dinosaurs evolved into birds. Since this claimed evolutionary transition necessitates the concept that a land-based creature developed the ability to fly, aeronautical considerations such as center of gravity should be considered. Birds have an anteriorly placed center of gravity, near the chest, enabling pitch stability in flight, meaning that a bird's nose up or nose down pitch angle is stable and controllable. Theropod dinosaurs have a posteriorly placed center of gravity, close to the hip joint, which runs counter to pitch stability in flight. This author conducted a literature review of evolutionary research regarding claims of dinosaur-to-bird evolutionary, anterior shift in center of gravity. Review of the evolutionary literature at the time of this writing reveals reliance on several hypotheses regarding supposed morphological changes to shift the center of gravity, and questionable labeling of birds as dinosaurs as evidence that the center of gravity did indeed shift. The goals of this paper are to form a hypothesis that birds and theropod dinosaurs have always had distinct differences in center of gravity, make predictions from that hypothesis, and recommend topics for further research.