# Sean Carroll on Reddit (u/seanmcarroll)

Part of Scientists on Reddit, researched with Autumn (https://www.autumn.ai) from public sources. Updated 2026-11-07. Interactive version: https://www.autumn.ai/resources/scientists-on-reddit/sean-carroll

Sean Carroll: Theoretical physicist and author.

- Reddit account: [u/seanmcarroll](https://www.reddit.com/user/seanmcarroll/) (AMA only)
- How we know it's theirs: [The 2014 r/IAmA AMA, posted from this account](https://www.reddit.com/r/IAmA/comments/26msnd/)
- Where they post, in the records we retrieved: r/IAmA (235), r/askscience (222), r/seancarroll (100), r/Physics (16), r/sixers (9), r/podcasting (2)
- Known activity in the posts we found: 2007 to 2026
- Wikipedia: https://en.wikipedia.org/wiki/Sean_M._Carroll

## Moments

### u/seanmcarroll in r/askscience, May 25, 2016 · AMA answer

Replying to a redditor:

> Hello Sean. Given your similarity in name to Sean B Carroll, and both of your strong science outreach activities, do you have any fun stories to share about sharing the same name? If you challenged him to a duel to the death, what weapons would you choose? Also, have you ever…

> There is photographic evidence that we can exist in the same spatial vicinity without mutual destruction. But he is clearly the evil twin, given the evidence of the beard.

(Excerpt.)
Full thread: https://www.reddit.com/r/askscience/comments/4kza3d/comment/d3jdf6s/ · 19 points as of Nov 7, 2026

### u/seanmcarroll in r/askscience, May 25, 2016 · AMA answer

Replying to a redditor:

> Hi Sean! I've had your arrow of time book on my shelf for years, and I'd like to personally apologize for not picking it up yet. No good reason, really. Sorry. My question: So-called hidden variable theories of QM have been getting a lot more play in the popular press recently…

> As an author, as long as you've purchased the book, your work here is done.

(Excerpt.)
Full thread: https://www.reddit.com/r/askscience/comments/4kza3d/comment/d3jc9hh/ · 35 points as of Nov 7, 2026

### u/seanmcarroll in r/seancarroll, Apr 1, 2019 · Behind the scenes

Replying to the post "Sean Carroll's new book - acknowledgements".

> Spoiler alert: the last paragraph of the acknowledgements reads as follows. "Thanks also to Jennifer for bringing into our lives Ariel and Caliban, the best writing-partner cats an author could ask for. No actual cats were subjected to thought experiments during the composition of this book."

Full thread: https://www.reddit.com/r/seancarroll/comments/b827ap/comment/ejvhtdk/ · 18 points as of Nov 7, 2026