Palaeo After Dark

The gang spends their 5th anniversary podcast discussing the evolution and distribution of early tetrapods. So basically, we messed up. But at least you can enjoy some insightful discussions about how to improve Sabrina the Teenage Witch. That's something, right?




Up-Goer Five (James Edition):

The group forget and barely care about their day which comes around every year for five times now. This time they talk about animals with four legs at around the time where they just got out of the water and lived on land before a lot of them died when the things that are not animals and are green and make air went away and everything got less wet.

The first paper looks at when these wet areas went away and whether these early animals with four legs ended up with fewer animals that are found over a wider area or lots of animals that are each found in only one area each. It had been though that this change in how much wet made these animals got moved into lots of small areas, but the new paper shows that actually animals with four legs got a lot moved to much wider areas, but that this is because the animals with four legs that lived in water became much less easier to be found while animals with four legs that live on land and have balls that their babies live in early on that don't need water take over and change how animals with four legs lived on the big ball of rock we live on.

The second paper looks at where animals with four legs lived before and after the bad time where almost all life died. The paper is interested at whether more animals lived on the middle of the outside of the big ball of rock that we all lived on or whether more of them lived near the top or the bottom of the outside of the big ball of rock. The paper is looking at whether there really is a time where animals with four legs do not live at the middle of the big ball of rock during the bad times where everything was dying. The paper looks at this by seeing how much the rocks lie to us and hide animals that were really there. One way they do this is by looking at tracks as well as dead bodies. This leads to shouting but both people are right and it is okay. The paper shows that while there was some time where there were less animals with four legs in the middle of the big ball of rock, they were still there and so maybe there were just less of them than before but they were not all dead.



 Dunne, Emma M., et al. "Diversity change during the rise of tetrapods and the impact of the ‘Carboniferous rainforest collapse’." Proc. R. Soc. B. Vol. 285. No. 1872. The Royal Society, 2018. 

 Bernardi, Massimo, Fabio Massimo Petti, and Michael J. Benton. "Tetrapod distribution and temperature rise during the Permian–Triassic mass extinction." Proc. R. Soc. B. Vol. 285. No. 1870. The Royal Society, 2018. 


Additional music by Russell Watson used in accordance with fair use under the creative commons license. Music was modified from its original form.

Direct download: Podcast_132_-_Weve_Been_Doing_This_For_Five_Years.mp3
Category:general -- posted at: 3:00am EDT

The gang discusses two papers that look at the complex evolutionary history of sauropod dinosaurs. In particular, these papers try to determine how sauropods geography might have affected their evolutionary history. Also, James learns some valuable lessons about hot tub safety, Curt mindlessly quotes Futurama, Amanda discusses the surprising skills of her cats, and everyone has a deeply disturbing realization about the Flintstones.


Up-Goer Five (James Edition):

This week the group looks at two papers that focus on big stupid angry animals with no hair. Both papers are looking at the type of big stupid angry animals with no hair that were very big and had thick legs and really long necks. The papers are interested in where the big angry animals with really long necks lived, and how where they lived change over time.

The first paper looks at a new big angry animal with a long neck from the place where food is big and people are armed. The reason this animal is interesting is because it is part of a group that was thought to all be dead but the new animal shows that they lived longer than we thought. All the older animals in its group came from a long way away, and so this animal shows that the group lived longer than we thought and that they did so by moving into a new place.

The second paper also looks at a big angry animal with a long neck from the hot place with the long water running through it. This animal is part of a group we find on lots of other places, but not here. This animal shows that the group made it into the very large land where the rains are, even though a different group of animals with very long necks are usually there.



 Sallam, Hesham M., et al. "New Egyptian sauropod reveals Late Cretaceous dinosaur dispersal between Europe and Africa." Nature ecology & evolution (2018): 1. 

 Royo-Torres, Rafael, et al. "Descendants of the Jurassic turiasaurs from Iberia found refuge in the Early Cretaceous of western USA." Scientific Reports 7.1 (2017): 14311. 

Direct download: Podcast_131_-_Would_Sauropod_Ribs_Be_Tasty.mp3
Category:general -- posted at: 3:00am EDT