What if the answer to the climate crisis has been buried at the bottom of the sea for millions of years?

At MARUM, the Center for Marine Environmental Sciences at the University of Bremen, there is a place that holds more than 200 kilometers of material drilled from the ocean floor. More than 350,000 core pieces. Collected over 55 years of scientific expeditions across the Atlantic, the Arctic, the Mediterranean, and the Black Sea. One of only three places like it in the world.

This is the Bremen Core Repository. And it is, in the words of the scientist who has guarded it for more than three decades, an Earth history book.

In this episode, we meet Doctor Ursula Röhl — Ula — the head of the Bremen Core Repository Group, who has witnessed the development of this archive from its foundation in 1994. She is joined by Doctor Thomas W ...