Palaeo After Dark

The gang discusses two papers that look at plankton through time. The first paper looks at some Cambrian acritarch fossils and shows that they are likely colonial algae, and the second paper looks at how shifting temperature affected plankton distribution across the Cenozoic. Meanwhile, everyone stays completely on task with the stated goals of this podcast: a detailed (and wrong) discussion on the events of the movie “The Hunt for Red October”. Yes, it is going to be “one of those” podcasts.

 

Up-Goer Five (Curt Edition):

The friends talk about two papers that look at things that live in the water without having to move parts to stay in the water and maybe they are single cells and maybe they are groups of cells. The first paper looks very very old things that live in the water. These old things are so old and hard to figure out that people are not always sure what they are. These things are often thought to be all single cells. This paper shows that some of these things that are very old might be groups of cells that are living together. The way that these cells group together does look like some things that live in the water today that make food from the sun. This paper shows that this type of cell or something like it might have been around a very very long time ago.

The second paper looks at how where things living in the water but not moving and maybe they are single cells and maybe they are groups of cells, could have lived when things got cold in the past. They see that there are changes in the types of these things over time and where the live. They show that the way things are today is because it was getting colder. It also shows that, when things warm up, we might see some big changes in where these things are.

 

References:

Woodhouse, Adam, et al. "Late Cenozoic cooling restructured global marine plankton communities." Nature 614.7949 (2023): 713-718.

Harvey, Thomas HP. "Colonial green algae in the Cambrian plankton." Proceedings of the Royal Society B 290.2009 (2023): 20231882.

Direct download: Podcast_273_-_The_Hunt_for_Red_Plankton.mp3
Category:general -- posted at: 3:00am EST

The gang discusses two papers that deal with the evolution of tardigrades. The first paper looks at some fossil tardigrades in amber, and the second paper looks to the Cambrian to determine the ancestors of modern tardigrades. Meanwhile, Amanda confuses some details about medication, James has some money making crab solutions, and Curt is somehow the one person trying to keep people on track.

 

Up-Goer Five (Curt Edition):

The friends look at two papers that look at a group of animals that are very very very small and have been seen as cute by a lot of people even though you can not really see them without help. The first paper finds some of these very very small animals in bits that come out of things that grow big and make their own food. These bits get hard when they get covered in ground over a long time and things that get stuck in the stuff can be there. This paper looks at these old very very small animals and tries to see what they could be like. It also talks about how we might not have as good an idea of these animals because they are so small and we do not always look for small things in these kinds of places.

The second paper looks at the older things that might be great great great great mom and dad to the tiny animals today. These animals are much bigger and much much older. This paper shows that lots of things we see in these tiny animals today may have been parts that we see in these older animals. But also, that in order to get so very very very small, these animals may have lost some parts so that they could get that small.

 

References:

Kihm, Ji-Hoon, et al. "Cambrian lobopodians shed light on the origin of the tardigrade body plan." Proceedings of the National Academy of Sciences 120.28 (2023): e2211251120.

Mapalo, Marc A., et al. "A tardigrade in Dominican amber." Proceedings of the Royal Society B 288.1960 (2021): 20211760.

Direct download: Podcast_272_-_The_Tardigrade_Cast.mp3
Category:general -- posted at: 2:00am EST

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