Your Brain is a Time Machine, with Dean Buonomano

Your Brain is a Time Machine, with Dean Buonomano

by StarTalk

Life & Natural Systems Neuroscience PSANNeurosciencesPSAN5Cognitive and behavioural neuroscience
🎙 StarTalk 👥 5.8M 📅 January 17, 2026 ⏱ 49 min 👁 923K 📄 expert opinion 🧭 2026-08-03
Available in: English (current) Français

Keywords

time perceptionmental time travelcircadian rhythmneural dynamicstime dilation

Summary

In this StarTalk episode, Neil deGrasse Tyson, Chuck Nice, and Gary O’Reilly host Dean Buonomano, a professor of neurobiology and psychology at UCLA, to explore the neuroscience of time. The conversation begins with how the brain tells time, contrasting man-made clocks that rely on oscillators with the brain’s use of neural dynamics. Buonomano explains that the brain has multiple clocks for different timescales, such as circadian rhythms and millisecond timing for sound localization. He discusses the importance of timekeeping in life, including experiments with cyanobacteria that show how circadian clocks confer a competitive advantage. The discussion then shifts to the human relationship with time, highlighting the role of clocks in the Industrial Revolution and the concept of mental time travel, which distinguishes humans from other animals. The philosophical debate between presentism and eternalism is introduced, questioning whether the past, present, and future are equally real. Buonomano explains memory as a reconstruction of the past and discusses the brain’s spacetime, including the temporal window of integration and the McGurk effect. The episode also touches on time dilation, the possibility of uploading knowledge to the brain, and whether the brain is the only time machine. The conversation concludes with reflections on the brain’s ability to understand itself and the universe.

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Critical Evaluation

The episode provides a compelling and accessible overview of the neuroscience of time, featuring Dean Buonomano, a leading expert in the field. The discussion is well-structured, moving from basic mechanisms of time perception to more complex philosophical implications. Buonomano’s explanations are grounded in scientific research, such as the cyanobacteria experiments and the role of the suprachiasmatic nucleus, lending credibility to the content. The hosts effectively facilitate the conversation, with Chuck Nice providing humor and Gary O’Reilly anchoring the discussion. However, the conversational format occasionally leads to oversimplification, and some topics, such as the nature of time in physics, are treated superficially. The episode does not delve deeply into the technical details of neural dynamics, but it succeeds in making the subject engaging for a general audience. The sources cited are limited to Buonomano’s book, which is a solid reference, but the episode could benefit from referencing specific studies. Overall, the content is scientifically sound and thought-provoking, though it may leave experts wanting more depth. The title accurately reflects the content, and the episode’s strength lies in its ability to spark curiosity about the brain’s relationship with time.

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Title / Content Match

The title accurately reflects the episode's focus on the brain's relationship with time, as discussed with Dean Buonomano.

Quality & Reliability

8/10

The discussion features a recognized expert in neuroscience (Dean Buonomano) and covers topics grounded in established research, such as circadian rhythms and mental time travel. The content is presented in an accessible manner but remains scientifically accurate. The main limitation is the conversational format, which may oversimplify complex concepts.

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Contribution & Novelties

The episode offers a unique interdisciplinary perspective by bridging neuroscience and physics to explore the nature of time. It highlights the brain’s use of dynamic patterns rather than oscillators for timekeeping, and introduces the concept of mental time travel as a defining human ability. The discussion of the McGurk effect and temporal window of integration provides concrete examples of how the brain processes time. The philosophical debate between presentism and eternalism adds depth, encouraging viewers to question the fundamental nature of time.

Pour aller plus loin :

  • Mental time travel — A concept central to the episode, with a Wikipedia article providing an overview.
  • Circadian rhythm — The biological clock mechanism discussed, with a detailed Wikipedia entry.
  • McGurk effect — A perceptual phenomenon mentioned in the episode, with a Wikipedia article explaining it.

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Radar Profile

The radar profile shows high scores in information quantity, quality, and reliability, with a slightly lower technical level, reflecting the accessible yet scientifically grounded nature of the episode.

Reliability 8/10

💬 Très positif. Sur les 30 commentaires analysés, les téléspectateurs expriment un fort enthousiasme pour l'épisode, saluant la qualité de l'invité, l'équilibre entre science et humour, et la clarté des explications.