58. The Silurian Hypothesis, evolution, civilizations, aliens, and the legacy of humanity.

I explore how the Silurian Hypothesis provides insight into what it takes for a planet to host or evolve a civilization, how we might detect them, and the legacy of humans on Earth.  

Chapters

• 0:00 The Silurian hypothesis leads to interesting questions
• 9:15 Why did key evolutionary innovations take so long
• 24:00 What's needed for a civilization, and how to detect them
• 31:26 The legacy of humans on Earth
• 44:15 Reflections on the Silurian Hypothesis and science