Unreasonable
stories.

Concrete That Works With the Ocean, Not Against It

In this episode, Daniel Epstein sits down with Dr. Ido Sella, co-founder and CEO of ECOncrete. Ido is a marine biologist who discovered, largely by accident, that small changes to concrete composition could make marine infrastructure support biodiversity instead of destroying it. His company has deployed projects across 50+ coastlines in 30+ countries, delivering 7x more carbon sequestration than standard concrete infrastructure. But the conversation goes far deeper than the technology. Ido shares the story of losing his co-founder, Dr. Shimrit Perkol-Finkel, in 2021, one month before closing their Series A. He talks about the decision to carry the company forward in her name, how every single investor said the same thing without coordinating, and the line that now guides his leadership: "It's not a crisis until someone is dying." The episode also features one of the best founder stories you'll hear, closing a funding round from a makeshift chair on a desert hilltop, listening to Leonard Cohen, waiting for emails to ping through a Bluetooth speaker.