Introductions all around- the podcast, the period of time we’ll be exploring, and the host. We’ll start by scaling Earth’s entire history down to a manageable 365 days.

How can rocks tell us the stories of ancient Earth- stories of magma, water, and life? To answer that question, we look at a few common rock types and examine how they formed.

Our introductory trilogy on deep time ends by tackling an important question: How do we know how old the Earth is?