Modern Wisdom

Podbit · Modern Wisdom

Black Holes, Denny’s Fist Fights & Japanese Handjob Culture - Rabbit Hole #4 - #1118

Explore episode Jul 2, 2026

Where this was said

The Most Mind-Blowing Facts About the Universe

At 16:20 · chapter starts 16:18

Tim Urban, deep in research for his history-of-everything book, describes the black hole era: after the last stars die around 100 trillion years from now, only black holes remain, slowly evaporating via Hawking radiation over 10^106 years. To convey this number, he devised a ribbon analogy: if every centimetre represents a billion years and you pack 1.4 billion observable universes tightly with that ribbon, you reach the end of the black hole era. The dark era that follows is exponentially longer still — the entire black hole era doesn't even constitute the first proton of the first atom of the first letter of the first word on the first page of the first book in a library filling trillions of observable universes. Chris Williamson introduces the Boötes supervoid — a region up to a billion light-years across that is almost entirely empty — and floats the theory that advanced civilisations may be hibernating, waiting for the universe to cool so that computation becomes more efficient, which would explain the silence of the Fermi Paradox.

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