Today, we'll learn how deep humans have traveled into the planet, and how we know what's even deeper down. We'll meet mineral oozes, coils of liquid iron, and a Danish woman from the 1930s who discovered the center of the Earth.

Extra credit: Make a tin-can telephone, find an inductor in one of your electric appliances, or look for an aurora.

How did Earth grow from ant-size to, well… Earth-size? What perils did it face along the way? And how is the Earth's interior like a fine vinaigrette? Find out as we move forward in time from 4.6 to 4.5 billion years ago.

Extra credit: try to freeze a mixture of oil and vinegar before they separate, find an iron meteorite at your local museum, or look for Ceres with a pair of binoculars.

Season 1 Premiere

We finally start the tale of Earth’s history from the beginning, in the cold depths of outer space. The Sun is born and the first asteroids assemble. When these asteroids crash into Earth today, they provide time capsules from the beginning of the solar system.

Extra credit: look for the Orion Nebula in the night sky, or go meteorite hunting with a friend.

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

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.

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.