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Was Penrose Right? NEW EVIDENCE For Quantum Effects In The Brain

PBS Space Time · explainer · Watch on YouTube

Consciousness & cognitionQuantum physics

What it is

PBS Space Time examines Roger Penrose's idea that consciousness arises from quantum processes in the brain, and reviews new evidence about microtubules. It ends with an estimate of what replicating consciousness would demand.

Why Hacker News recommends it

Pointed to as a clear, balanced overview of quantum-brain theories when AI consciousness and brain models come up.

  • 2 people recommended it
  • 2 different months
  • 0 strong recommendations
  • first 2024, last 2026

What HN commenters said

  1. “check especially the ending summary where they calculate more or less how much would be necessary”

    Ending estimates what replicating human consciousness would require.

    dev1ycan, 2024-08 · Recommendation · in “Nvidia reportedly delays its next AI chip due to a design flaw”

  2. “excellent PBS Space Time on that”

    Explains Penrose's theory that quantum effects underlie the brain.

    ck2, 2026-08 · Recommendation · in “Could a computer scientist build a brain?”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: roger penrose, microtubules, consciousness, quantum biology, pbs space time

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