Listen to Episode 71 on PodBean, Spotify, YouTube, or that other podcast place you like!
Let’s take a trip back to the Cretaceous of North America, when the whole middle of the continent was flooded by an inland sea unlike anything in the world today. It split the continent in two and hosted a unique ecosystem now preserved across fossil sites from Canada to the Gulf of Mexico. It was the Western Interior Seaway.
Listen to Episode 43 on PodBean, Spotify, YouTube, or wherever podcasts are sold (just kidding, it’s free!).
For tens of millions of years, North and South America were separate sisters across the sea, each with their own unique ecosystems. That is, until around 3 million years ago, when tectonic activity birthed the Isthmus of Panama and allowed an incredible mass migration of life across the bridge: The Great American Biotic Interchange.
Listen to Episode 31 on PodBean, Spotify, YouTube, or that other place you get podcasts!
Before the Cambrian Explosion, there was … a lot of weird squishy organisms. The Ediacaran, the subject of this episode, was a period just before the Cambrian. During this time we see the rise of a very odd and interesting group of organisms known as the Ediacaran Biota.
The Common Descent Podcast 