Dinosaurs. What springs to mind when they’re mentioned? Colossal, towering sauropods? Packs of feisty feathered fiends? Or huge herds of hadrosaurs, chomping their way across the plains of long-lost worlds? Most, including myself, will automatically default to any one of these images when dinosaurs come up in conversation (what, you mean it’s not that frequent for normal people?) But we often neglect to think the earliest dinosaurs, spectacular organisms that gave birth to the most successful, and on-going, terrestrial vertebrate radiation of all time.
This is a slightly different post to the usual, you know, fossils and shit. It concerns the psychology behind climate change and mobilising towards a green future. Now this is by no means my area of expertise, but when I attended a talk recently by Oliver James at The Photographers’ Gallery in London, entitled “Our Mad World”, it really struck a chord with me. As a young research scientist, considering the psychology behind the science is really quite tangential to what I’ve been taught, and not something I’ve ever considered in detail. James gave a wonderful talk (without using PowerPoint, bonus!), and the way in which he spoke and delivered his message really resonated with the attendees.
The story of vertebrate evolution over the last 250 million years is one of the most remarkable, and most complex to unravel, stories of all time. Throughout the ages, extraordinary species and groups have come and gone, and we are left now with only a fingerprint of times long forgotten. Recreating and detecting macroevolutionary patterns within and between vertebrate groups using the fossil record involves an excruciating amount of work, due to the massive amount of data required to be sampled, and the potential number of parameters that could influence biological trends.
Continuing work from his MSc thesis, Roland Sookias (and Roger Benson and Richard Butler) continues to make a name for himself by rigorously analysing the terrestrial tetrapod record within the late Palaeozoic and early Mesozoic. His latest paper [free to access!] extends the analysis of his first (looking at the interaction of intrinsic traits (i.e., body mass) within and between clades of tetrapods around the time that dinosaurs began their ascent) by looking at the impact of extrinsic (i.e., environmental) parameters on body size.