Most people rush through 30th Street Station without ever looking at the walls.

I didn’t either — until a young intern named Amanda called me from the top of a hill and changed the way I see that building forever.

In this episode, I tell the story of how limestone quarried in Alabama — 300 to 400 million years old — ended up forming the walls of one of Philadelphia’s busiest train stations… and how those walls are filled with ancient fossils hiding in plain sight.

This is a short, story-driven episode about curiosity, paying attention, and the extraordinary things we walk past every day without noticing.

Once you see it, you can’t unsee it.

What you’ll hear in this episode

• A phone call from an intern that sparked the Fossils Project
• Why 30th Street Station’s walls  ...