Whether it be because of their unique shape, comical walking or extreme ecology, there can be no denying that penguins are incredibly popular and charismatic animals. But what actually makes a penguin a penguin and how are they different from other birds? Have penguins always been, well, 'penguiny'? Joining us for this interview are Simone Giovanardi and Daniel Thomas who have just described a new species of giant penguin from New Zealand. Together, we explore penguin evolution and how their new species Kairuku waewaeroa fits into this story.

Palaeocast

Episode 129: Penguins

 One of the factors that makes palaeontology such a popular science is its constant ability to surprise us. It seems almost every week that a new study is released that significantly adds to our understanding of ancient life. This could be in relation to a new species, a new analysis or new fossil locality. In this episode, we discuss a new discovery that not only yields a new species, but also provides direct dietary evidence and has us re-evaluating the potential for food to be preserved in coprolites (fossilised droppings). Joining us for this interview are Drs Martin Qvarnström and Martin Fikáček of Uppsala University and National Sun Yat-sen University, respectively. Both were part of a team that identified and described a new species of beetle preserved within a dinosaur coprolite! In this second part of this interview, we take a look at both the coprolite and the beetle in closer detail and ask what is the significance of this association for the study of both? We also consider the potential for coprolites to be micro-lagerstätten.

Episode 128: Coprolite Inclusions Pt2

 One of the factors that makes palaeontology such a popular science is its constant ability to surprise us. It seems almost every week that a new study is released that significantly adds to our understanding of ancient life. This could be in relation to a new species, a new analysis or new fossil locality. In this episode, we discuss a new discovery that not only yields a new species, but also provides direct dietary evidence and has us re-evaluating the potential for food to be preserved in coprolites (fossilised droppings). Joining us for this interview are Drs Martin Qvarnström and Martin Fikáček of Uppsala University and National Sun Yat-sen University, respectively. Both were part of a team that identified and described a new species of beetle preserved within a dinosaur coprolite! In this first part of the interview, we provide the context for the discovery, discussing the study of coprolites and of beetles. Part 2 of the interview will be released soon. 

Episode 127: Coprolite Inclusions

In this episode, we talk to our very own Dr Elsa Panciroli about her new book Beasts Before Us. In it, she tells the untold story of mammalian evolution, tracing the origin of synapsids back to the Carboniferous. You’ll be taken to fossil sites around the world to meet some of these pioneering animals and some of the palaeontologists that discovered them. For this interview, we’ll give you an overview of the early evolution of synapsids and dispel many of the misconceptions about what our ancestors were really like. We’ve got a couple of copies of the book to give away, so look out on our social media channels for details of the competition! For everyone else, Beasts Before Us is available to buy online and in all good book shops.

Episode 126: Beasts Before Us

Crocodiles are often referred to as “living fossils”, but if we compare modern and ancient species, does that label hold up? What different kind of morphologies (shapes) did past crocs have and how did they live? How quickly did this past diversity arise and why are we left with so few species today? What’s to stop them from diversifying again? In this episode, we speak to Dr Tom Stubbs, University of Bristol, about his recent work analysing changes in crocodylomorph disparity through time. We look at some of the weird and wonderful crocs of the past and work through his methods for calculating their rates of evolutionary innovation. Part 2 of 2

Episode 125: Crocodylomorph disparity Pt2

Crocodiles are often referred to as “living fossils”, but if we compare modern and ancient species, does that label hold up? What different kind of morphologies (shapes) did past crocs have and how did they live? How quickly did this past diversity arise and why are we left with so few species today? What’s to stop them from diversifying again? In this episode, we speak to Dr Tom Stubbs, University of Bristol, about his recent work analysing changes in crocodylomorph disparity through time. We look at some of the weird and wonderful crocs of the past and work through his methods for calculating their rates of evolutionary innovation. Part 1 of 2

Episode 124: Crocodylomorph disparity

Terrestrial life as we know it couldn’t exist without soil. Soil, as we know it today, is a layer of minerals, organic matter, liquids, gasses and organisms that not only provides a medium for plant growth, but also modifies the atmosphere, provides a habitat for animals and retains and purifies water. This kind of soil hasn’t always existed, so in order to understand early conditions on land, we first need to understand what can be constituted as a soil and when these first appeared. Is there soil on the Moon? Can soil fossilise? Since most terrestrial ecosystems are rooted in soil, if we want to understand how life established itself on land, we first need to know how soils form, how they have changed over geological time and which kinds of plants and fungi can live without it. Joining us in this episode is Dr Ria Mitchell, Experimental Officer in X-ray Computed Tomography at the University of Sheffield, UK.

Episode 123: Soil

Part two of our interview with Dr Larisa DeSantis of Vanderbilt University on the 'dietary ecology' of Smilodon. Smilodon is probably one of the most iconic mammalian apex predators with its extended upper canines and robustly-built forearms. In fact, when we compare Smilodon to modern cats (felids), we don't see these same characteristics. So what were they used for? Was Smilodon specialised for any particular behaviour? Owing to the unique preservation of the tar seeps at Rancho La Brea, Los Angeles, USA, we can find an overabundance of predators, including Smilodon fatalis, Canis dirus, Panthera atrox and Puma concolor. This allows researchers to reconstruct the predatory landscape of the area in the Pleistocene. Who was eating what? Was there any competition between predators?

Episode 122: Dietary Ecology of Smilodon fatalis pt2

Smilodon is probably one of the most iconic mammalian apex predators with its extended upper canines and robustly-built forearms. In fact, when we compare Smilodon to modern cats (felids), we don’t see these same characteristics. So what were they used for? Was Smilodon specialised for any particular behaviour? Owing to the unique preservation of the tar seeps at Rancho La Brea, Los Angeles, USA, we can find an overabundance of predators, including Smilodon fatalis, Canis dirus, Panthera atrox and Puma concolor. This allows researchers to reconstruct the predatory landscape of the area in the Pleistocene. Who was eating what? Was there any competition between predators? All of these questions feed in to the ‘dietary ecology’ of Smilodon and here to discuss that, and more, is Dr Larisa DeSantis of Vanderbilt University.

Episode 121: Dietary Ecology of Smilodon fatalis Pt1

It wouldn’t be outlandish to state that many a fossil collection has started with the acquisition of an ammonite. Their planispiral shells (termed a conch) are instantly recognisable and since that conch was originally composed of the relatively hard mineral aragonite, they better lend themselves to the fossilisation process. But how much do we actually know about the animal that produces the conch? We might be able to make superficial inferences based on comparisons with the modern Nautilus, but ammonites are actually closer related to squid and octopuses. So could you recognise an ammonite without its shell? Prof. Christian Klug of the University of Zurich has recently described just that: a naked ammonite. In this episode, we learn about ammonite soft body anatomy and sink our teeth into the mystery of how this ammonite lost its shell.

Episode 120: Naked Ammonite

The Soom Shale is an Ordovician lagerstätte in the Western Cape of South Africa. Whilst it lacks the diversity of organisms seen in other lagerstätten, such as the Burgess Shale or Chengjiang, it more than makes up for it in the fidelity of preservation. The taphonomic pathway to the fantastic preservation in the Soom Shale is long and complex, reliant not only on local conditions, but also ties into global climatic events. It’s vitally important when interpreting fossils to understand the taphonomy as it provides so much context as to what you can see in fossils and, as equally important, what you can’t. Joining us for this episode is Prof. Sarah Gabbott, a taphonomist from the University of Leicester, UK.

Episode 119: The Soom Shale

Piecing together the early lives of dinosaurs is difficult due to a lack of fossils from juvenile and embryonic stages. In this episode, Elsa Panciroli talks to Dr Kimi Chappelle, a postdoctoral fellow at the Evolutionary Studies Institute, part of the University of Witwatersrand in Johannesburg, South Africa. Chappelle specialises in sauropodomorphs – the precursors of the giant sauropod dinosaurs like Diplodocus. Her recent work is helping build a picture of their growth and development. Chappelle is a champion of South African palaeontology and nominated as one of the Mail and Guardian’s top 200 young South Africans in Science and Technology. With her colleagues she has published a stunning new study of sauropodomorph embryos from a fossil nest site in South Africa. This new paper visualises and describes their tiny skulls using synchrotron scan data. These fossils provide new information on dinosaur developmental processes, and places South African fossils at the heart of our understanding of their early evolution. Chappelle also talks about the latest work she’s involved with in Zimbabwe, and future research into the growth patterns of the largest dinosaurs to have ever lived.

Episode 118: South African Sauropodomorphs

Lack of diversity is one of the major issues in the sciences in recent times. We’ve discussed diversity in palaeontology in previous podcasts, but in this episode Elsa takes a look at the legacy of racism and colonialism in palaeontology and museum collections, and what efforts are being made to address these issues. Colonial attitudes towards people of non-European descent have meant that their natural heritage was often plundered and sent back to Europe and the United States to fill museum shelves. Researchers continue to benefit from these resources. How should we change our scientific practice to recognise this legacy and avoid making the same mistakes now and in the future? In the first part of the episode, Elsa speaks to Christa Kuljian, a historian of science and author of Darwin’s Hunch, based at the University of the Witwatersrand in Johannesburg. She’ll examine the legacy of racism in science, focusing on palaeoanthropology in South Africa, including figures like Robert Broom and Raymond Dart. We’ll hear how attitudes toward different races shaped the research and conclusions of past generations of scientists. In the second part, Rob Theodore, Exhibitions and Displays Coodinator at the Sedgewick Museum in England, talks about the legacy of colonialism in museum collections. We’ll find out about the ways in which specimens were collected in the past, and how this was related to contemporary events and attitudes. We’ll also find out what moves being taken to decolonise museums and refocus public outreach to recognise the past and move positively into the future.

Episode 117: Decolonising Palaeontology

When we think about the Ice Age or the Pleistocene, we generally think of large animals: wooly mammoths trudging through snow, sabre-tooth tigers taking down their next meal, and big bison out on the steppes. These are really interesting things to think about, but what else can we learn from the Pleistocene other big animals and their extinction? We can also use the Pleistocene (which is relatively similar to the modern world in terms of continental layout, landscapes, and ecological niche availability) to explore questions of palaeoecology, biotic interactions and how changes in the environment can affect the local fauna. The relatively young age of the Pleistocene means that the available data is very different to palaeoecological studies of the Cretaceous or Eocene. This means that it is more appropriate for drawing comparisons to what's happening today or what might happen in the future with climate change. Joining us in this interview is Dr Jacquelyn Gill, an Associate Professor at the University of Maine, who works in palaeoecology. We talk about the different data available, the importance of understanding palaeoecology, including a recent paper from her group on seabird ecology in the Falklands, and what this might mean for the future.

Episode 116: Ice Age Palaeoecology

A free webseries exploring the fossil record and the evolution of life on Earth.