Dinosaurs, But Not Only: Vertebrate Evolution in the Mesozoic

If we imagine walking through Mesozoic lands, we would be able to observe vertebrates with peculiar combinations of morphological traits, some of which would seem to be intermediary to animals seen today. We would witness a terrestrial vertebrate fauna dominated by dinosaurs of various sizes and diversity, accompanied by many other animal groups that often are overlooked. Current research suggests that many of the main vertebrate clades existing today originated or diversified sometime in the Triassic or Early to Middle Jurassic. Herein, we profile some of the major transformations in both terrestrial and aquatic vertebrate evolution during the Mesozoic. We highlight: the appearance of features that allowed sauropod dinosaurs to become the largest animals to ever walk on Earth’s continents, the appearance of herbivory among the usually carnivorous theropod dinosaurs, and we follow the specific changes that led to the evolution of avian flight. Our Mesozoic tour across the globe will allow us to see how different evolutionary forces led to convergent shifts to quadrupedality in ornithischian dinosaurs and to an aquatic lifestyle in turtles, crocodiles, and plesiosaurs. Last, but not least, we examine changes in the Mesozoic fauna linked to the rise of mammals, and the diversification patterns in several clades of fishes after the End-Permian Mass Extinction

A springtime journey to the Soviet Union: Postwar planning and policy mobilities through the Iron Curtain

This article builds upon a relatively small but growing literature in geography, planning and cognate disciplines that seeks to understand the variegated geographies and histories of policy mobilities. The article uses a case study of an exchange trip between town planners in the Soviet Union and the UK between 1957 and 1958. It focuses on the experiences of the British planners in the Soviet Union and sets the tour within the wider context of a fluctuating and sometimes turbulent history of Anglo-Soviet politics, travels and connections. In doing this, the article makes three arguments: first, there is much to be gained by bringing together the geography-dominated policy mobilities literature with that on exchanges and visits by architects, engineers and planners. Secondly, the greater sensitivity to the histories of policy mobilities allows contemporary studies to be contextualized in the longer history of organized learning between different urban professions. Thirdly, despite the long history of policy mobilities, what differentiates the current era from previous eras is the prominent `knowledge intermediary' roles now played by consultancies and think tanks. As the article will demonstrate, it was branches of government and professional bodies, rather than consultancies and think tanks, that tended to dominate such roles previously