Signals from the Deep: Radio Hour

The Silurian Hypothesis

54 min · 12 de jun de 2026
Portada del episodio The Silurian Hypothesis

Descripción

What if mankind were not the first advanced civilization on Earth? Would we be able to detect the remnants of a culture a million years before our own? A 2018 paper authored by an astrophysicist and a climate scientist asked these questions and presented the evidence we might look for. Massive carbon spikes in the geological record from industrial emissions. Atomic signatures of nuclear activity from a billion years ago. Both sound impossible, except that we have found both of those exactly. We’ll cover the men behind the paper, the hypothesis itself, how the evidence lines up with the biggest anomalies in the geological record, and try to decide if an advanced pre-human civilization really walked the earth. Join us as we examine The Silurian Hypothesis!

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The Silurian Hypothesis

What if mankind were not the first advanced civilization on Earth? Would we be able to detect the remnants of a culture a million years before our own? A 2018 paper authored by an astrophysicist and a climate scientist asked these questions and presented the evidence we might look for. Massive carbon spikes in the geological record from industrial emissions. Atomic signatures of nuclear activity from a billion years ago. Both sound impossible, except that we have found both of those exactly. We’ll cover the men behind the paper, the hypothesis itself, how the evidence lines up with the biggest anomalies in the geological record, and try to decide if an advanced pre-human civilization really walked the earth. Join us as we examine The Silurian Hypothesis!

12 de jun de 202654 min