Sun, 28 October 2018
The gang discusses two papers that use the pelvis and spine material from pterosaur fossils to infer locomotion of these extinct flying archosaurs, Specifically, we talk about how muscle attachment structures as well as channels within the bones can be used to infer the mobility of ancient animals. Also, Amanda tries to resist talking about food, James makes boner jokes, and Curt ends up writing odd crossover fan-fiction.
Up-Goer Five (James “Oh God I Need an Adult” Edition):
The group look at two papers that are studying the dead animals that can fly but do not have anything covering their bodies. The first paper looks at how the part of the flying animal with nothing on their bodies that holds the legs and also where animals have to touch to make babies (here after: the fuck box) is different in different animals. The paper shows that the fuck box looks different in baby animals to grown animals, and that we need to recognize babies so that we don't make bad ideas about how these animals changed through time. They also show that the fuck boxes in the earliest of these animals look a little more like the fuck boxes of babies, but that they are very definitely actually over 18. They also show that there are at least two different types of fuck boxes in these animals, and this means that these animals would have walked in different ways to each other.
The other paper looks at the fuck box and back of a small animal that could fly that is not covered in stuff and looks at the spaces in it to see how the bits that make the animal go looked like. The spaces for the bits that make the animal go show that it had big legs, and probably was good at walking, even though it was small and would not have needed to be good at walking. It has family that got very big though, and it seems that these big family friends would have been good at walking too.
Hyder, Elaine S., Mark P. Witton, and David M. Martill. "Evolution of the pterosaur pelvis." Acta Palaeontologica Polonica 59.1 (2014): 109-124.
Martin‐Silverstone, Elizabeth, Daniel Sykes, and Darren Naish. "Does postcranial palaeoneurology provide insight into pterosaur behaviour and lifestyle? New data from the azhdarchoid Vectidraco and the ornithocheirids Coloborhynchus and Anhanguera." Palaeontology(2018).
Sun, 14 October 2018
The gang returns to one of their favorite pet topics, food! This week, we discuss two papers that investigate what different animals are eating. Specifically, we focus on a paper that uses fossil data to infer the feeding strategies of extinct giant otters, and another paper that seeks to answer the question of whether or not modern bonnethead sharks are omnivorous. Also, Amanda finds her spirit anime character, James workshops new ideas for the podcast at the worst possible time, Curt leads us on a strange aside about bears and wolves, and we all work together to invent the perfect animal.
Up-Goer Five (Curt Edition)
Our friends talk about what animals eat. First they talk about long four legged animals with hair who have high voices. Some of these long four legged animals from a long time ago were really really big. When we study the hard parts of these really big, long four legged animals, we find that they can break open other really hard things in order to eat them. When we look at the hard parts of living long, four legged animals with high voices, we find that these old big long four legged animals were probably able to break things in different ways than the living animals just because they were so very very big. This shows that long four legged animals in the past could fill different jobs in the world than the living, much smaller four legged animals.
Second, the friends look at animals that spend all their time in the water and have lots of inside parts that do not break. These water animals are often thought to eat other animals only. However, these water animals have been shown to eat green things that make food from the sun. People did not know if these water animals meant to eat the green things that make food from the sun, or if they did not mean to. Some people took some of these water animals and had these water animals eat a lot of green things that make food from the sun. The water animals got bigger, and seemed to do well when they were made to eat only these green things. The people decided that this meant the water animals meant to eat the green things and that meant that not all water animals with inside parts that do not break eat only other animals.
Tseng, Z. Jack, et al. "Feeding capability in the extinct giant Siamogale melilutra and comparative mandibular biomechanics of living Lutrinae." Scientific Reports 7.1 (2017): 15225.
Direct download: Podcast_147_-_Otters_and_Sharks_and_Wolves_Oh_My.mp3
Category:general -- posted at: 3:00am EDT