Join Finley as he travels around the world and back in time to explore everything from fossils to volcanoes and even how rocks helped formed our planet!

In this episode we discover how geologists use rust in rocks to determine how much oxygen was in the atmosphere billions of years ago.

Plus we find the answers to questions such as ‘why is Mars red?’.

> Visit the Geology Rocks homepage
> Download the free Geology Rocks podcast from iTunes