Mindscape Ask Me Anything, Sean Carroll | July 2026

Comments · 91

• AL

  @AlfiePT · 2 months ago

  Not sure where the usual timestamp guy is but here are some in the meantime:<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA">0:00</a> – Intro<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=115">1:55</a> – State of the Boltzmann brain debate (swampland program, de Sitter fluctuations)<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=1618">26:58</a> – Matter-to-energy conversion machine for a sci-fi novel<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=1800">30:00</a> – Reflecting on the Eric Weinstein debate a year later<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=2245">37:25</a> – Erosion of DEI in academia<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=2717">45:17</a> – Release date of Complexity and Emergence<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=2889">48:09</a> – Mixed states vs. pure states for the universe&apos;s quantum state<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=3376">56:16</a> – CMB redshift/gravity and time distortion in the early universe<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=3875">1:04:35</a> – Cosmological constant problem vs. the ultraviolet catastrophe<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=4223">1:10:23</a> – Remembering the past vs. imagining the future<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=4369">1:12:49</a> – Hume&apos;s problem of induction<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=4733">1:18:53</a> – Optimal frequency of elections<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=4956">1:22:36</a> – Donald Hoffman&apos;s &quot;trace&quot; mathematics/consciousness<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=5044">1:24:04</a> – Teaching natural philosophy in astronomy class<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=5278">1:27:58</a> – Keeping Earth in the habitable zone long-term<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=5479">1:31:19</a> – Bias, incentives, and rigor in physics research<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=5739">1:35:39</a> – Reconciling liberalism with the common good<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=6063">1:41:03</a> – Does emergent space secretly presuppose time?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=6224">1:43:44</a> – Bayesianism vs. QBism<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=6419">1:46:59</a> – Priority question: &quot;quantum magnetometry&quot; heartbeat claim<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=6532">1:48:52</a> – What kind of thing is an &quot;observer&quot;?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=6602">1:50:02</a> – Restoring factors of c after setting c=1<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=6866">1:54:26</a> – Hofstadter&apos;s conjoined-twin consciousness thought experiment<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=7018">1:56:58</a> – Is every measurement ultimately electromagnetic?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=7148">1:59:08</a> – Could Laplace&apos;s demon predict nuclear fission?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=7306">2:01:46</a> – Podcast theme song / guest renditions<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=7410">2:03:30</a> – Scientific plausibility in science fiction<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=7540">2:05:40</a> – Immortality/vampires<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=7761">2:09:21</a> – Why neutrinos aren&apos;t &quot;matter&quot; in the early universe<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=7873">2:11:13</a> – Priority question: reincarnation vs. born-again Christians<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=8037">2:13:57</a> – Big Mysteries survey: dark matter vs. MOND<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=8152">2:15:52</a> – Organizing research papers<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=8254">2:17:34</a> – Where does vacuum-expansion energy come from?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=8483">2:21:23</a> – Moving in with a partner<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=8669">2:24:29</a> – Measuring the usefulness of an emergent description<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=8823">2:27:03</a> – Are identical multiverse copies one consciousness or many?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=8930">2:28:50</a> – Is the universe &quot;surprisingly young&quot;?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=9049">2:30:49</a> – Priority question: physical analogs of logic gates (AND/NOT)<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=9132">2:32:12</a> – Gut feelings on finite vs. infinite spacetime<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=9200">2:33:20</a> – Philosopher Stanley Cavell and existential uncertainty<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=9558">2:39:18</a> – Is position non-fundamental? Entanglement evidence?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=9633">2:40:33</a> – Should papers require an LLM-prompt appendix?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=9747">2:42:27</a> – Entangled particles across a black hole horizon<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=9851">2:44:11</a> – &quot;Glow up&quot; / reversing entropy<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=9939">2:45:39</a> – Free will, decoherence, compatibilism<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=10250">2:50:50</a> – Hawking radiation, positive/negative energy particles<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=10388">2:53:08</a> – Fighting for the word &quot;compatibilism&quot;<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=10507">2:55:07</a> – Arrow of time vs. &quot;rate&quot; of time<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=10594">2:56:34</a> – How were the Switzerland/Ireland workshops?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=10686">2:58:06</a> – Research FOMO as a young physicist<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=10913">3:01:53</a> – &quot;Human&quot; vs. &quot;anti-human&quot; views of physics<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=11004">3:03:24</a> – AI plagiarism in academia<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=11164">3:06:04</a> – Cyclic universe: can civilizations survive heat death?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=11219">3:06:59</a> – Could teleology hide in the laws of physics?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=11307">3:08:27</a> – Cyclic cosmology, U-shaped entropy, &quot;islands&quot; of time<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=11436">3:10:36</a> – Favorite season of The Wire<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=11619">3:13:39</a> – Does coarse-graining/emergence lose or add information?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=11903">3:18:23</a> – Why is the gluon massless; does &quot;travel&quot; apply?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=12111">3:21:51</a> – How&apos;s the bass playing going?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=12172">3:22:52</a> – Terminator time travel and closed timelike loops<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=12369">3:26:09</a> – How do QM interpretations relate to quantum gravity?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=12446">3:27:26</a> – Is Hilbert space like a computer simulation&apos;s memory?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=12517">3:28:37</a> – Favorite physics visualizations (tattoo ideas)<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=12668">3:31:08</a> – Can &quot;mattering&quot;/goal-seeking emerge in an LLM?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=12801">3:33:21</a> – Favorite multi-volume SF/fantasy epics<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=12896">3:34:56</a> – Free-will argument and undecidability<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=13194">3:39:54</a> – Should peer reviewers be anonymous?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=13487">3:44:47</a> – How was the Ireland trip?<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=13649">3:47:29</a> – Building intuition for Everettian branching<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=13756">3:49:16</a> – Contributing to philosophy without a PhD<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=13939">3:52:19</a> – Effective field theory beyond the Standard Model<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=14038">3:53:58</a> – Countable vs. uncountable Hilbert space dimensions (final question)<br><a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=14673">4:04:33</a> – Sign-off

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• US

  @user-yv6xw7ns3o · 2 months ago

  I think it&apos;s incredibly cool that you regularly do these gargantuan AMAs Sean!

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• DA

  @davegrundgeiger9063 · 2 months ago (edited)

  <a href="https://www.youtube.com/watch?v=YCEG9dM43DA&amp;t=8174">2:16:14</a> To hear the GREAT Sean Carroll declare &quot;I am a mess&quot; when it comes to his organizational style around doing research made me feel better about my shortcomings.

  4

• MI

  @MichaelWhitenton · 2 months ago

  Well shucks, I was only here for the intro.

  5

• 23

  @2309sparrow · 2 months ago

  I’m just happy seeing the timestamp…July nights in India need this😊

  5

• MI

  @mickeybrumfield764 · 2 months ago (edited)

  Sean seems like an incredibly busy guy. I don&apos;t know how he is able to do all the things that he does. He must be quite motivated. I guess there isn&apos;t anything more motivating than possibly discovering or undercovering the secrets of the universe for us.

  2

• MA

  @macfrommage949 · 2 months ago

  You know what? I really like how you&apos;re going against Thiel&apos;s project, or the whole Yarvinverse if you will. Polite, factual, and with a mission statement. It would be a perfect world where scientists just get to do science all day, but you recognise you&apos;re going to have to engage those kinds of destructive politics, and you do it in the most gentlemanly way. I&apos;d say good for you, but good for all of us.

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• DF

  @dfquanta · 2 months ago

  Thank you, Professor Carroll, for having the courage and patience to stand up for academic integrity. It is incredible in this day and age to see figures like Peter Thiel and Eric Weinstein use their wealth and platforms to undermine public trust in the scientific establishment just to peddle chemically induced theories and ideological agendas. Your refusal to let physics be undermined by loony podcast culture while calmly reminding everyone that real science requires peer review and rigorous critique(not just complaints), is public service at its finest. Keep defending the truth. I truly believe that you stand among the greatest of your field, and I’m both excited and fearful of what the future holds for society. I hope this setback ushers in another golden age for science.

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• CO

  @coreyander286 · 2 months ago

  Perhaps the real intro was the friends we made along the way.

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• BE

  @benjones1717 · 2 months ago

  &quot;By the laws of thermodynamics&quot; - I am He-Man!

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• BR

  @BrianCastaneda-p6r4 · 2 months ago

  First of all, how dare you

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• PI

  @PIW_Charles · 2 months ago

  Good Monday Morning fellow science nerds~!

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