Signals from the Deep: Radio Hour

The Silurian Hypothesis

54 min · 12. juni 2026
episode The Silurian Hypothesis cover

Description

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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episode The Silurian Hypothesis artwork

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. juni 202654 min