Episode 124 – Snowball Earth

Listen to Episode 124 on PodBean, YouTube, iTunes, or anywhere you can find it!

An Earth covered in ice might sound far-fetched, but there is enough evidence in the geologic record and climate modeling for Earth scientists to suspect this has actually happened in our planet’s past – more than once. This episode, we discuss the origins, evidence, and much-debated questions surrounding the hypothesis of Snowball Earth.

Continue reading

Episode 123 – Spiders

Listen to Episode 123 on PodBean, YouTube, iTunes, or anywhere you can find it!

With eight legs, eight eyes, venomous fangs, and a knack for living just about everywhere, they’re the famous famous arachnids and among the most famous arthropods on Earth, and they’ve been successful for a good 300 million years. This episode, we discuss the diversity and evolution of Spiders.

Continue reading

Episode 118 – Trace Fossils

Listen to Episode 118 on PodBean, YouTube, iTunes, or maybe somewhere else!

As organisms live, grow, and move in their environments, they leave all sorts of evidence behind on their surroundings. When this evidence becomes preserved in the geologic record, it can be provide some of our best clues to understanding lifestyles and evolution of ancient life. This episode, we talk about Trace Fossils.

Continue reading

Episode 117 – Crabs and Carcinization

Listen to Episode 117 on PodBean, YouTube, iTunes, or wherever else you can find it!

Several thousand living species – and many more fossils – are called “crabs,” but they don’t all share an evolutionary history. The crab-like body plan is a repeated trend in crustacean evolution, and there are differing opinions on what exactly counts as a “crab” and why natural selection keeps making them. This episode, we talk Crabs and Carcinization.

Continue reading

Episode 115 – Biomes

Listen to Episode 115 on PodBean, YouTube, iTunes, or pick your favorite place for podcasts!

The Earth is covered in ecosystems, but what lives where is dependent on the local climate and landscape. This variation creates vast patterns in the distribution of life, patterns that scientists can use to understand ecology, and patterns that have changed over time as the Earth’s surface has transformed. This episode, we discuss the modern state and ancient history of Biomes.

Continue reading