Frame from The Biggest Ideas in the Universe: Introduction Plays with YouTube's privacy-enhanced embed

The Biggest Ideas in the Universe: Introduction

Open on YouTube First HN thread

5 HN users recommended this lecture in 5 different months between 2021 and 2025.

2007–2026
4 strong recommendations 1 recommendation HackerTube score 7

HN commenters recommend the series as engaging, substantial physics with just enough math for non-specialists.

Sean Carroll introduces his video series on the biggest ideas in physics, such as symmetry, space and matter, as informal discussions with follow-up Q&A videos. This is the short opening video of the series.

Pull quote: “Just enough math to be interesting but nothing requiring a math degree.” (HN, 2025)

Also tagged: modern physics, sean carroll, physics, quantum mechanics, popular science, lecture series

What Hacker News said

5 labeled comments from the HN archive; up to 20 are kept per video, favoring different commenters. Each one links back to the original thread.

Strongly recommends Diederich March 2021 under Reality as a Vector in Hilbert Space
Substantial yet approachable physics series with some math
Read the full comment
The author is [link] Shortly after Covid19 started last year, he started a series of videos called "The Biggest Ideas in the Universe", playlist here: [this video] I've watched quite a lot of this so-called 'popular' hard science material on youtube, and this series was by far the best I've run across. His approach is a bit different from most others, and his presentation is engaging, approachable but also fairly substantial. Specifically, he doesn't elide all of the relevant math, but doesn't get too deep at the same time. You'll see a lot of integrals, derivatives and graphs. For example, he talks about an hour on the big idea of 'Change', and another "Space". Perhaps even more interesting are the followup Q&A videos, which are as long as and perhaps even more detailed than the source. Do give the linked six minute intro video a watch.
Strongly recommends Trasmatta May 2022 under PBS SpaceTime
Great physics series by Sean Carroll
I'd also recommend Sean Carroll. His "Biggest Ideas in the Universe" series is really great: [this video] I'd also recommend his podcast, Mindscape.
Strongly recommends mperham February 2025 under Noether's Theorem Revolutionized Physics
Physics series with just enough math
Sean Carroll’s Biggest Ideas in the Universe YouTube series is fantastic. Just enough math to be interesting but nothing requiring a math degree. [this video]
Recommends jackdoe August 2025 under Death and What Comes Next (2002)
Helps laypeople ask better quantum mechanics questions
Read the full comment
Ignoring the moral question in the story, many people are satisfied by saying "haha funny, the cat is both dead and alive" and they just move on. Reading Pratchett for almost 30 years, it has fueled quite an interested in quantum mechanics in me, he subtly introduces QM teasers in almost every book I read. Particularly Mort. As I dropped out of highschool, I didnt have the luck to properly study physics, but in my 30s, I my existential crisis hit, as they say, a man dies twice, and the stupid half dead cat wouldn't leave me alone. And one night the omnipotent youtube algorithm recommended Susskind's lectures to me, then Feynman, Shankar, .. it just kept going. Now I watch and re-watch them but take screenshots and send them to claude when I am confused (which is still most of the time). If you are a layman like me and just want to know what is up with the cat, I encourage you to watch Sean Carroll's lectures (dont miss the Q&A videos) and it will for sure allow you to ask at least better questions. I love that cat so much. --- Sean Carroll: [this video] Richard Feynman: [link] and [link] Leonard Susskind: [link] Ramamurti Shankar: [link] Barton Zwiebach: [link] Carl Bender: [link] If you struggle with calculus, I found Herb Gross to be partucularly good Herb Gross: [link] Of course watch 3blue1brown, alphaphoenix, styropyro etc as well

Keyboard shortcuts

/
Search
j k
Next / previous video in a list
Enter
Open the focused video
l
Like (on a video page)
w
Watch later (on a video page)
?
This help
Esc
Close