The Cenozoic Episodes

Running time 3 hours

We are up to the Cenozoic Era in the monthly episodes. This one combines the 31 episodes from December 2014, covering the Cenozoic, into one episode, and it completes the packaging of each month of episodes from the original series.

As usual for this monthly compilation, I’ve left the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.

Thanks for your interest in this project. If you have questions or comments, please let me know, either here on the blog – there’s a page for Questions– or contact me by email at rigibson at earthlink.net. I’ll try to respond. You can of course also leave a review on iTunes. I really do appreciate your feedback.

For 2016, I’m going to TRY to have more frequent new programs than I did in 2015. Some upcoming topics, many suggested by you listeners, include fluorescence in minerals, questions about the oxygen crisis back in the Precambrian, the Tepuis in South America, and more. Thank you!

—Richard I. Gibson

The Cretaceous Episodes

Running time 2 hours 30 minutes

We are up to the Cretaceous Period of the Mesozoic Era in the monthly episodes. This one combines the 30 episodes from November 2014, covering the Cretaceous, into one episode.

As usual for this monthly compilation, I’ve left the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.

If you have questions or comments, please let me know, either here on the blog – there’s a page for Questions – or contact me by email at rigibson@earthlink.net. I’ll try to respond. You can of course also leave a review on iTunes. I really do appreciate your feedback.

—Richard I. Gibson

The Jurassic Episodes

Running time 2 hours 5 minutes

We are up to the Jurassic Period of the Mesozoic Era in the monthly episodes. This one combines the 31 episodes from October 2014, covering the Jurassic, into one episode.

As usual, I’ve left the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.

If you have questions or comments, please let me know, either here on the blog – there’s a page for Questions– or contact me by email at rigibson at earthlink.net. I’ll try to respond. You can of course also leave a review on iTunes. I really do appreciate your feedback.

—Richard I. Gibson

The Triassic Episodes

Running time 1 hour 45 minutes

Shonisaurus from the Triassic of Nevada. Maximum length, 49 feet. Drawing by Nobu Tamura http://spinops.blogspot.com used under Creative Commons license.

We are up to the Triassic Period of the Mesozoic Era in the monthly episodes. This one combines the 30 episodes from September 2014, covering the Triassic, into one episode.

As usual, I’ve left the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.

If you have questions or comments, please let me know, either here on the blog – there’s a page for Questions– or contact me by email at rigibson at earthlink.net. I’ll try to respond. You can of course also leave a review on iTunes. I really do appreciate your feedback.

—Richard I. Gibson

The Permian Episodes

Running time 2 hours




We are up to the Permian Period of the Paleozoic Era in the monthly episodes. This one combines the 31 episodes from August 2014, covering the Permian, into one two-hour episode.

As usual, I’ve left the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.

Thanks for your interest in this project. As the year continues, I really do hope to have occasional new episodes in addition to these monthly assemblies. I know I haven’t accomplished that as much as I wanted to – sorry, but I plead a complicated year.

If you have questions or comments, please let me know, either here on the blog – there’s a page for Questions– or contact me by email at rigibson at earthlink.net. I’ll try to respond. You can of course also leave a review on iTunes. I really do appreciate your feedback.

—Richard I. Gibson

The Pennsylvanian Episodes

Running time 1 hour 45 minutes



This episode is the seventh monthly package that combines the daily episodes for July 2014, covering the Pennsylvanian Period of the Paleozoic Era. As with the Mississippian, I apologize for not getting this assemblage done on time – my summer has been pretty complicated.

As usual, I’ve left the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.

As the year continues, there will be occasional new episodes in addition to these monthly assemblies.

If you have questions or comments, please let me know, either here on the blog – there’s a page for Questions– or contact me by email at rigibson at earthlink.net. I’ll try to respond. You can of course also leave a review on iTunes. I really do appreciate your feedback.

—Richard I. Gibson

The Mississippian Episodes

Running time 1 hour 30 minutes

This episode is the sixth monthly package that combines the daily episodes for June 2014, covering the Mississippian Period of the Paleozoic Era. I apologize for not getting this assemblage done on time – my summer has been pretty complicated.

As usual, I’ve left the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.

Thanks for your interest in this project. As the year continues, there will be occasional new episodes in addition to these monthly assemblies.

If you have questions or comments, please let me know, either here on the blog – there’s a page for Questions– or contact me by email at rigibson at earthlink.net. I’ll try to respond. You can of course also leave a review on iTunes. I really do appreciate your feedback.

—Richard I. Gibson

The Devonian Episodes

Running time 2 hours 20 minutes

This episode is the fifth monthly package that combines the daily episodes for May 2014, covering the Devonian Period of the Paleozoic Era.

As usual, I’ve left the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.

If you have questions or comments, please let me know, either here on the blog or contact me by email at rigibson at earthlink.net. I’ll try to respond. You can of course also leave a review on iTunes. I really do appreciate your feedback.

—Richard I. Gibson

The Silurian Episodes

Running time 2 hours

This episode is the fourth monthly package in the History of the Earth Calendar. It combines the daily episodes for April 2014, covering the Silurian Period of the Paleozoic Era.

As usual, I've left the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.

As the year continues, there will be occasional new episodes in addition to these monthly assemblies.

If you have questions or comments, please let me know, either here on the blog – see the tab page for Questions, above – or contact me by email at rigibson at earthlink.net. I’ll try to respond. You can of course also leave a review on iTunes. I really do appreciate your feedback. Thanks for your interest and support.

—Richard I. Gibson

The Ordovician Episodes

Running time 2 hours 15 minutes

This episode is the third monthly package of the History of the Earth calendar. It combines the daily episodes for March 2014, covering the Ordovician Period of the Paleozoic Era.

You’ll find that I’ve left the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.

As the year continues, there will be occasional new episodes in addition to these monthly assemblies.
If you have questions or comments, please let me know, either here on the blog – there’s a page for asking questions tabbed above – or contact me by email at rigibson at earthlink.net. I’ll try to respond. You can of course also leave a review on iTunes. I really do appreciate your feedback.

—Richard I. Gibson

The Cambrian Episodes

Running time 2 hours 10 minutes

For 2014, the podcast consisted of daily productions averaging about 5 minutes each. The individual episodes for each month are now being assembled into packages for each month, representing various spans of time in the history of the earth. 

This episode is the second package, which combines the daily episodes for February, covering the Cambrian Period of the Paleozoic Era. This includes all the individual daily episodes from February 2014.

There is variable audio quality in some of the individual recordings, which are conversations between me and other geologists – the nerds in a bar episodes. And I’m leaving the references to specific dates in the podcast so that you can, if you want, go to the specific blog post that has links and illustrations for that episode. They are all indexed on the right-hand side of the blog.


As the year continues, there will be new episodes, maybe every week or two, in addition to these monthly assemblies.

If you have questions or comments, please let me know, either here on the blog on the ask a question page, or contact me by email at rigibson at earthlink.net. I’ll try to respond.

—Richard I. Gibson

The Precambrian - the daily episodes from 2014 combined

For 2014, the podcast consisted of daily productions averaging about 5 minutes each. The individual episodes for each month are now being assembled into packages for each month, representing various spans of time in the history of the earth.

This episode is the first package, which combines the 31 daily episodes for January, covering the Precambrian – the time from the origin of planet earth up to about 543 million years ago. This episode is an hour and 15 minutes long and includes all the individual daily episodes from January 2014.

If you listened to last year’s daily episodes, you’ll find that I’ve re-recorded some of them. Especially in early January, when I was just getting started, some of the episodes were technically lacking. I hope I have improved on that for this assembly of 31 episodes covering the Precambrian. Thanks very much for your interest in this project. As the year continues, there will be new episodes, maybe every week or two, in addition to these monthly assemblies.

If you have questions or comments, please let me know, either here on the blog – there’s a page for Question of the Week – or contact me by email at rigibson at earthlink.net. I’ll try to respond.

—Richard I. Gibson