Epochs of the Universe - The Cosmic Clock & Civilization

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Explore the entire life story of the cosmos, from quantum flickers at the Big Bang to the distant eras of black holes and dark energy, and discover what kinds of civilizations might endure across these unimaginable spans of time.

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Credits:
Spaceport Innovations - Designing the Next Generation of Launch Sites
July 31, 2025; Episode 744
Written, Produced & Narrated by: Isaac Arthur
Epochs of the Universe - The Cosmic Clock & Civilization (July 31, 2025)
Recorded: June 2025
Written by: Isaac Arthur
Editor: Lukas Konecny
Select imagery/video supplied by Getty Images
Music Courtesy of Epidemic Sound

Chapters
0:00 Intro
2:26 The T-Scale — Time, Terrifyingly Large and Small
8:25 The Grand Unification Epoch
10:30 The Inflationary Epoch
15:40 The Electroweak Epoch
17:41 The Quark Epoch
18:19 The Hadron Epoch
19:28 The Early Universe
22:52 The Stelliferous Era (T10–T14)
22:24 Into the Darkness (T15-T67)
31:56 The Sojourn
32:54 The Black Hole Era
36:55 The Dark Era
40:29 Final Fates: Cycles, Cracks, and Cosmic Cliffhangers