Podcast 251a - D&D Part 1 - In The Footsteps of Giants

Dispatched to pursue a giant roaming monolith laying waste wherever it walks join our heroes Beppo the Bard (James), Bix the Druid (Aly), Gregg the Ranger (Curtis) and Kinroth the Wizard (Amanda) as they set out to bring a halt to this lumbering gargantuan structure's meandering path of destruction in a story orchestrated and told by our visiting Dungeon Master (Antony).

"Skye Cuillin", “Lord of the Land”, “Mountain Emperor”, “Black Vortex”, “Evening of Chaos” by Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 4.0 License
http://creativecommons.org/licenses/by/4.0/

“Snake Eater” midi from vgmusic.com http://www.vgmusic.com/new-files/MGS3_Snake_Eater.mid

Podcast 250 - Penguin Death Land 2; Death Harder

The gang goes back to their favorite hypothetical deathtrap amusement park, Penguin Deathland. They discuss two papers that look at the taphonomy of penguin fossil deposits and what they can tell us about ancient environments and the processes that can break down bone. Meanwhile, James loves old movie cliches, Amanda upsets the natural order, and Curt enjoys totally real colors.

Up-Goer Five (Amanda):

Today our friends talk about animals with no hair that usually can fly but these can't fly. These are found on an small place surrounded by water that is very cold. These animals lived during the ice age so they are only sort of rock at this time. The first paper looks at numbers of these animals and other stuff all together in one place. The paper shows that there were places where there were baby animals long ago where there aren't any now. It also shows that there were some tiny animals with no rock parts that suck blood that are not on these small places today. But it is possible that some of these tiny animals were brought in later by people.

The second paper looks at how things that are green things and sometimes good to eat not-animals that are living together are hurting the rock parts of these animals with no hair that can usually fly but can't. It turns out that the things that are green things living together with sometimes good to eat not-animals might be very good at hurting the rock parts of these animals, and we can actually see exactly what that looks like and so can tell if we see this in rock parts that would be much much older.

References:

Acosta Hospitaleche, Carolina, et al.  "Taphonomy of two Holocene penguin taphocoenoses in Potter Peninsula,  South Shetland Islands, Antarctica." Historical Biology (2022): 1-18.

García, Renato, Carolina Acosta  Hospitaleche, and Gonzalo Márquez. "Biodeterioration of Antarctic fossil  penguin bones caused by lichens from the Eocene La Meseta Formation." Polar Biology 44.12 (2021): 2243-2254.

Podcast 249 - The Fishiest Podcast

The gang discusses two papers from a new locality of early fishes that give a lot of new insights into fish evolution. Meanwhile, Curt loves new Discord features, James shares some fun stories, and Amanda know how best/worst to keep everyone on track.

Up-Goer Five (Curt Edition):

Our friends look at two papers from a group of papers that just came out about a place where you can get really good parts from very very old things that live in the water and have hard parts on the inside and would be great great great great mom and dad to a lot of things that have hard parts inside and live on land. One paper looks at these animals that do not have a hard part in the place where they eat and looks at how they have really cool ways to move through water that gives us ideas about how these things that help move through water have changed over time. The other paper looks at a lot of different types of these animals that live in water and shows that they were doing a lot of different things very early on.

References:

Zhu, You-an, et al. "The oldest complete jawed vertebrates from the early Silurian of China." Nature 609.7929 (2022): 954-958.

Gai, Zhikun, et al. "Galeaspid anatomy and the origin of vertebrate paired appendages." Nature 609.7929 (2022): 959-963.

Podcast 248 - Chucky D Facts

The gang discusses two papers that look at two papers that discuss the origin and evolution of a sessile filter feeding life habit. The first paper discusses how a new tommotiid fossil helps us better understand lophophorate evolution, and the second paper looks at the genetic pathways that barnacles and molluscs use to generate their shells. Meanwhile, James makes a sound, Amanda gets a surprise, and Curt shares totally real facts.

Up-Goer Five (Curt Edition):

Our friends look at how animals that make hard parts and do not do much moving around first started. The first looks at one type of animal that could be the start of one of these groups of animals that do not move much. These early animals are usually hard to find because they have parts that do not stick around for along time. However, this animal that was found had a lot of soft parts that showed what these animals would have looked like. It seems that these animals started out as being able to move a lot more, even though the animals that would come later would stop moving.

The second paper looks at two other groups of animals that make hard parts and do not move. It looks at how these animals make their hard parts. Even though these two groups are not close to each other, they both use a lot of the same ways of making their hard parts, with things that are not the same making sense because of how these animals need to stick to other things.

References:

Guo, Jin, et al. "A Cambrian tommotiid preserving soft tissues reveals the metameric ancestry of lophophorates." Current Biology (2022).

Yuan, Jianbo, et al. "Convergent  evolution of barnacles and molluscs sheds lights in origin and  diversification of calcareous shell and sessile lifestyle." Proceedings of the Royal Society B 289.1982 (2022): 20221535.

Podcast 247 - GSA 2022 Denver Meeting

James, Curt, Carlie, and Brendan talk about the 2022 Geological Society of America Meeting in Denver.

Podcast 246 - Fossil Record of Parental Care

The gang talks about two papers that look at evidence of parental care in the fossil record, in early synapsids and in insects. Meanwhile, Amanda is going to have an island, Curt is trying not to die, and James has some unique alternative interpretations to explain these fossils.

Up-Goer Five (Curt Edition):

Our friends talk about two papers that look at moms and dads from a long long time ago. Not all animals have moms and dads that stick around or do anything to keep the babies from not getting dead. The first paper looks at a group of animals that looks like some animals today and is part of a group that is close to the group that has hair. This paper looks at some hard parts from these animals that were in a thing made by pulling up the ground so you can live there under the ground. There is a big one and a small one. The big one looks like it was holding the small one when the place under the ground fell in and covered them. The other thing about this paper is that the small one looks like a lot of other animals we have found from this group, which could mean that most of our animals we have named from this group could be kids.

The second paper looks at a type of small animal with hard parts on the outside and many legs that lives in water and can go deep in the water but takes in air to live. This animal is old but looks a lot like the ones we still have around today. Some of these animals have a leg that looks different from the others, and this leg has a whole lot of small balls that hold babies in them on it. So some of these animals carry the babies with them until they are ready to leave the small balls. This is different from how the animals like these ones that we have today handle their babies.

References:

Fu, Yanzhe, et al. "The earliest known brood care in insects." Proceedings of the Royal Society B 289.1978 (2022): 20220447.

Maddin, Hillary C., Arjan Mann, and  Brian Hebert. "Varanopid from the Carboniferous of Nova Scotia reveals  evidence of parental care in amniotes." Nature Ecology & Evolution 4.1 (2020): 50-56.

Podcast 245 - The Fishopodcast

The gang discusses two papers that look at the complicated path tetrapods took to getting on land. The first paper looks at a more derived stem tetrapod that went back into the water, and the second paper uses trace fossils to investigate the foodweb of a community dominated by some early tetrapods. Meanwhile, Amanda has a friend over, James knows how to be silent, and Curt teaches everyone that things continue to exist even when we don’t see them.

Up-Goer Five (Curt Edition):

Our friends talk about two animals that are great great great great great great father and mother to all of the animals that are on the land. But these animals did not all make their way on to the land in a simple way. The first paper looks at an animal that looks like it went back into water. This animal has all of the parts that you need to live well in the water, even though it also has parts from animals that would be on the land, or at least spending some time on the land. This means that the way on to the land has a lot more steps forward and back than we like to think.

The second paper looks at the places these animals were living in and tries to use the parts that are around and how they were hurt to see what may have been eating what. People have thought that these animals went on to the land to get away from things that might have been eating them. This paper shows that those animals might have been the things that were eating other animals. It seems like being one of these animals that lives in the water was a pretty good way to live.

References:

Robin, Ninon, et al. "Vertebrate  predation in the Late Devonian evidenced by bite traces and  regurgitations: implications within an early tetrapod freshwater  ecosystem." Papers in Palaeontology 8.4 (2022): e1460.

Stewart, Thomas A., et al. "A new elpistostegalian from the Late Devonian of the Canadian Arctic." Nature 608.7923 (2022): 563-568.

Podcast 244 - What is This Clade's Time to Mammal?

The gang discusses two papers that look at the evolutionary changes occurring in early synapsids. The first paper suggests that some synapsids may have evolved a mammal-like walking gate and respiration earlier than we expected, and the other paper uses the inner ear of synapsids to infer body temperature. Meanwhile, James is adapting to a new environment, Amanda drinks some “tea”, and Curt gives acronym advice.

Up-Goer Five (Curt Edition):

Our friends talk about two papers that look at animals which are not the animals today with hair and warm blood but are part of the group that is brother and sister to those animals. These animals were around a long long time ago. These papers show that some of the things we see in animals with hair and warm blood today also happened in some of these other animals too. The first paper looks at a hard part inside the chest of these other animals. Most of these other animals have a hard part that is very different from the one we see in the animals with hair and warm blood. However, on group of these other animals seems to have a hard part that looks a lot like the ones we see today in animals with hair. This hard part is important for how we breathe and also how we move. This means that this group may have walked and breathed like the animals who have hair today, even though animals with hair got this hard part much later.

The second paper looks at the ear to see how warm the blood is for these other animals that are not animals with hair but are part of the group. This paper uses the water stuff in the ear to try and figure out how warm these animals would be. They look at the ear for a lot of dead animals from this group, as well as animals around today that we can see how warm they are. When they use what they find today on the very old dead animals, they see that there is a point in the past of these animals where they start to really get warm. This is still earlier in the group than our animals we have around today with hair that are warm.

References:

Bendel, Eva-Maria, et al. "The  earliest segmental sternum in a Permian synapsid and its implications  for the evolution of mammalian locomotion and ventilation." Scientific Reports 12.1 (2022): 1-9.

Araújo, Ricardo, et al. "Inner ear biomechanics reveals a Late Triassic origin for mammalian endothermy." Nature (2022): 1-6.

Podcast 243 - Giving Amanda New Phobias

The gang discusses two papers that look at the ecological impacts of major extinction events. The first paper looks at the ecological stability of marine communities before and after two mass extinction events, the late Ordovician and the end Permian. The second paper simulates an extinction event on modern bird populations to determine if this would most strongly impact functional diversity or phylogenetic diversity. Meanwhile, Amanda learns about something new to worry about, James shares dubious life advice, and Curt questions movie curses.

Up-Goer Five (Amanda Edition):

Today our friends look at two papers about things dying. The first paper wants to know if having more things that do all the same stuff will help keep the world better when everything else is dying. They look at an early time and then a later time that everyone knows is very, very, very bad. The earlier time is thought to be the second-most bad time for taking out things that do different things. But the paper shows that since, in that earlier time, there are more things doing the same thing, it's actually not so bad as the later time, when there are not so many things doing the same thing. More things are doing different things, so that the dying is worse.

The second paper is looking at animals that fly and don't have hair or hard skin. This paper is saying that some animals that fly and don't have hair or hard skin are dying more. However, these animals are not like brothers and sisters to each other, instead, they look like each other. This paper finds that animals that fly that do not have hair or hard skins that live in some places will start to look like each other more and more because some of the animals die out. That means that the remaining animals that fly but do not have hair or hard skin will be more like each other, and it means that things in these places might get bad, because there will be only a few things left that do one or two things.

References:

Dick, Daniel G., et al. "Does functional redundancy determine the ecological severity of a mass extinction event?." Proceedings of the Royal Society B 289.1979 (2022): 20220440.

Hughes, Emma C., David P. Edwards, and  Gavin H. Thomas. "The homogenization of avian morphological and  phylogenetic diversity under the global extinction crisis." Current Biology (2022).

Podcast 242 - CT Scan Your Blood Starved Beasts

The gang discusses two papers that analyze exceptional fossils using CT scanning. The first paper looks at an exceptionally preserved vampire squid, and the second paper looks at an exceptionally preserved early mammal. Meanwhile, Amanda follows medical advice, James is a consummate professional, and Curt learns about coleoids in real-time.

Up-Goer Five (Curt Edition):

Our friends look at two papers that use an important way of looking at things through hard stuff to try and figure out what a lot of older animals actually looked like. The first paper looks at an animal with an arm, and an arm, and an arm, and an arm, and an arm, and an arm, and an arm, and an arm which looks like it could hurt you but really just spends its time eating dead things. There is only one of these animals around today, but this older animal is thought to be a part of this group. By using this way of looking through hard parts, we can say that this old animal is a part of this group. Also, we can see that there are some ways that it is not the same as the living one. It seems that the old animal may have eaten things that were living, which is very different from how the animal around today lives.

The second paper looks at an old animal from a group we are a part of that has hair and warm blood. As we have talked about before, figuring out when we have the first of this group of animals is very hard, and lots of changes happen early on that then go back again. This animal gives us some really cool ways to look at some of these changes early on in this group. By using this way of looking through hard parts, they can look inside the head and see the ear parts. Ear parts are an important part of being a part of this group. So seeing how the ear parts have changed is a good way to see how this group is changing over time.

References:

Wang, Hai-Bing, et al. "A new mammal from the Lower Cretaceous Jehol Biota and implications for eutherian evolution." Philosophical Transactions of the Royal Society B 377.1847 (2022): 20210042.

Rowe, Alison J., et al. "Exceptional  soft-tissue preservation of Jurassic Vampyronassa rhodanica provides new  insights on the evolution and palaeoecology of vampyroteuthids." Scientific reports 12.1 (2022): 1-9.

Podcast 241 - The Shark and the Whale

The gang discusses two papers that look at what past sharks might have eaten. The first paper uses nitrogen isotopes to determine the trophic level of species belonging to the extinct shark genus Otodus, and the second paper shows evidence of predation/scavenging of sperm whales by sharks in the late Miocene. Meanwhile, James has a couch to burn, Curt proposes an experiment to find the best animal, Amanda becomes shark Nietzsche.

Up-Goer Five (Curt Edition):

Our friends look at two papers that look at what big angry animals with big teeth who breathe water and lived in the past could have eaten. The first paper looks at the parts of these animals from the past and uses what those parts of made of to try and see what kind of things they might have eaten. This is the first time that this has been done using these parts of the animal, since most of these kinds of papers look at living animals and so they can get parts that do not last when the animals die. It had been said that these big angry animals in the past may have eaten big animals that eat small things, and that they might have died out when there was less big animals that eat small things. This paper finds that the parts that make up these animals show that maybe these animals were eating things that ate other bigger things, that these big animals were probably not just eating this one type of animal but may have gone for anything, as well as other animals that also eat pretty much everything. One animal that they mention these big angry animals that breathe water could have eaten is a big animal with warm blood and big teeth that lives in water.

The second paper looks at how the hard parts of big animals with warm blood and big teeth that live in water at this time have hurt marks on their hard parts that look like they were from the teeth of big angry animals that breathe water. These hurt marks are along a part of the head that has a lot of stuff in it which animals would like to eat. The hurt marks are all different, with some that look like the animal bit them right on the head, and others look like marks from teeth that were biting at the body when it was already dead. It seems like many different types of angry animals with big teeth who breathe water may have been eating these animals with warm blood and big teeth.

References:

Kast, Emma R., et al. "Cenozoic megatooth sharks occupied extremely high trophic positions." Science Advances 8.25 (2022): eabl6529.

Benites-Palomino, Aldo, et al. "Sperm  whales (Physeteroidea) from the Pisco Formation, Peru, and their trophic  role as fat sources for late Miocene sharks." Proceedings of the Royal Society B 289.1977 (2022): 20220774

Podcast 240 - Chibi Gar

The gang discusses two papers that look at the impact of the end Cretaceous mass extinction. The first paper looks at ecomorphospace changes in mosasaur communities prior to the extinction event, and the second paper discusses the importance of a large freshwater gar which lived through the recovery. Meanwhile, James has some new and interesting ecological theories, Curt is simpatico with his recording equipment, and Amanda acts as our resident “fish” expert.

Up-Goer Five (Curt Edition):

Our friends talk about two papers that look at a time when a big rock hit us a long long time ago. The first paper looks at how big angry animals in the water that you can not drink did before the big rock hit. There is a big question about if these big angry animals that live in water you can not drink were doing well before the big rock hit, or if they were already on their way out. This paper looks at how the heads of these animals changed over space and time by looking at a large number of these from lots of different places. What they find is that there is a lot going on before the big rock hit. Some places are having their big animals look like they are having real problems, but in other places there seems to be a lot of new change in these big animals. It seems that this time before the big rock was a time when these big animals were going through a lot of changes. The big rock may have hit at a very bad time because things were not calm because of all of these changing going on.

The second paper looks at animals living in water you can drink after the big rock hit. This paper finds a very large animal that breathes water head. Since this is a group of animals that are still around today, they can use the head to figure out how big the animal would have been, and they find that it would have been pretty big and also would have eaten other animals. This animal lived pretty soon after the big rock hit. This might mean that animals living on land and in the water that you can drink may have been doing a lot better than things living in the water you can not drink. If an animal was able to get that big eating other animals, it seems that these places were doing well. One of the ways animals respond when things get bad and foot is short is that they get smaller. Since we do not see that happening in this place, it could mean that places like this were not hit that bad when the rock hit.

References:

MacLaren, Jamie A., et al. "Global  ecomorphological restructuring of dominant marine reptiles prior to the  Cretaceous–Palaeogene mass extinction." Proceedings of the Royal Society B 289.1975 (2022): 20220585.

Brownstein, Chase Doran, and Tyler R.  Lyson. "Giant gar from directly above the Cretaceous–Palaeogene boundary  suggests healthy freshwater ecosystems existed within thousands of  years of the asteroid impact." Biology Letters 18.6 (2022): 20220118.

Podcast 239 - Up To Date Memes

The gang discusses two papers that look at how combining fossil and modern data can affect our understanding of evolution. The first paper looks at studying primate biogeography, and the second paper studies how human interactions have affected dog morphology and disparity. Meanwhile, James finds a song he likes, Amanda could use some skin, and Curt appreciates how timely we’ve always been.

Up-Goer Five (Curt Edition):

Our friends look at two papers that show how using stuff from today and stuff from the past together can give you a better idea of what is going on with living things. The first paper looks at how we study where animals who look a lot like us lived in the past and how they came to live where they live today. The paper looks at how we can use old animals along with the animals around today to get a better idea of how the animals today got to where they are. That said, they do find that you need to take some care with the old animals you put in the study. You want to make sure that you really know what these old animals actually are. If not, it can make your study give weird answers. But, in the end, they show that it is better to use both old and today animals when you can.

The second paper looks at old dogs. Dogs can look like a lot of different things today. So people wanted to know if dogs could always look like so many different things in the past. So they found old parts of dogs from old human remains that date back to before people started to really change how dogs looked. They ran a study to see how different those dogs were from each other, and from dogs we have today, and also other things that are not dogs but are close to dogs. They find that these old dogs could be very different from each other, but not as different as the dogs we see today. They were a lot different from the other dog like animals too. So it shows that dogs were able to be very different in the past, but people have made this change even bigger.

References:

Wisniewski, Anna L., Graeme T. Lloyd,  and Graham J. Slater. "Extant species fail to estimate ancestral  geographical ranges at older nodes in primate phylogeny." Proceedings of the Royal Society B 289.1975 (2022): 20212535.

Brassard, Colline, et al. "Unexpected morphological diversity in ancient dogs compared to modern relatives." Proceedings of the Royal Society B 289.1975 (2022): 20220147.

Podcast 238 - Plants With Strong Goku Energy

The gang discusses two papers that look at the co-evolution of plants and herbivores. The first paper finds the earliest evidence of a unique type of insect herbivory in the fossil record, and the second looks at the evolutionary impact of the extinction of large herbivores on palm trees. Meanwhile, Curt recovers from COVID round 2, Amanda is a static character, and James finds that getting what he wants is almost worse than not getting it at all.

Up-Goer Five (Curt Edition):

Our friends talk about things that live in the ground and make their own food but are not able to move (like a tree and other things) and also the animals that eat these things. Some small animals eat the parts of trees that catch the sun but have this stuff that is supposed to get these small animals stuck if they try and eat these parts of the tree. The way that these small animals do this is either by cutting off the stuff that would get them stuck and then eating the rest of these parts that grab sun. We know that trees and other things like trees started to use this stuff a long time ago. This paper finds the first time that we know of in which these small animals were able to cut off the stuff that would get them stuck. They used the same ideas in the past that they use today, and it happened pretty close to when trees and other things like them started to use this stuff. This means that the trees and the small animals that eat them were changing with each other.

The second paper looks at how a type of tree that is not a real tree changed when the large animals that could have eaten it were not there. The people who wrote this paper had ideas about what changes could have happened when these not trees didn't have large animals around to eat them, but it turns out to have been a little different from what they might have thought. These not trees stopped making parts that would stop animals from eating them, but they didn't stop making big food. This might mean that big food is not just something that big animals can use, and that maybe small animals were eating the food and that would help the not tree to move its babies around.

References:

Onstein, Renske E., W. Daniel  Kissling, and H. Peter Linder. "The megaherbivore gap after the  non-avian dinosaur extinctions modified trait evolution and  diversification of tropical palms." Proceedings of the Royal Society B 289.1972 (2022): 20212633.

McCoy, Victoria E., et al. "Oldest fossil evidence of latex sabotaging behavior by herbivorous insects." Review of Palaeobotany and Palynology 300 (2022): 104631.

Podcast 237 - Day Walkers

The gang discusses two papers which use morphology to infer behavior in the fossil record. The first paper looks at the origins of the “killer whale” type morphology in fossil cetaceans, and the second paper describes the earliest example of a diurnal owl in the fossil record. Meanwhile, James proposes an unconventional workforce, Curt imagines the sea mammal revolution, and Amanda cuts the crap… out of her basement.

Up-Goer Five (Curt Edition):

Our friends talk about two papers that look at how things look and how we can use that to tell how animals might have lived in the past. The first paper looks at a group of animals with hair that breathe air but live their whole lives in water and do not have legs. There are lots of different types of these animals but one of these animals is named after being someone that kills. However, there is another group of these animals that look a lot like these animals that are named after killing but are not the same. This paper finds a really old one of these animals that looks like but is not one of these killing animals. These animals have things that make them eat in different ways than most of the animals with hair that live in water. This older animal may be the first time that these animals with hair who live in water were eating in this way. It also shows that this type of body that looks like these animals that are named for killing really did appear many times within the group.

The second paper looks at animals who fly that are usually out at night and kill very quietly. They find a very old one of these animals that is very complete and allows them to see lots of parts of the animal we usually do not get. These parts show that this animal may have actually been moving around during the day instead of at night, like most of the other animals in this group. They show that moving around in the day is something that a few of these animals today do and that it has appeared many times in the past. This animal might be the oldest one of these animals that lived in the day, and shows that, even though most of these animals today are out at night, the group has a lot more going on with whether or not these animals were out in the day or at night.

References:

Li, Zhiheng, et al. "Early evolution  of diurnal habits in owls (Aves, Strigiformes) documented by a new and  exquisitely preserved Miocene owl fossil from China." Proceedings of the National Academy of Sciences 119.15 (2022): e2119217119.

Bianucci, Giovanni, et al. "The origins of the killer whale ecomorph." Current Biology (2022).