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Nuclear 101: How Nuclear Bombs Work Part 1/2

Belfer Center
Lectures
YouTube
4 HN users recommended this lecture4 months2018–2024 score 5
Years with an HN recommendation, 2007–2026

HN recommends it as an entertaining, clear explanation of nuclear weapons basics from a policy expert.

Harvard Belfer Center lecture by Matthew Bunn explaining how nuclear bombs work, including fission and fusion weapons and which parts of bomb-making are hard. It is part 1 of 2 in the Nuclear 101 series.

“I highly recommend the "Nuclear 101: How Nuclear Bombs Work" lectures by Matthew Bunn” (HN, 2024)

2 strong recommendations · 2 recommendations · 1 citations · Lectures · intro

5 Hacker News comments

From the HN archive; up to 20 kept per video, favoring different commenters. Recommendations first.

@shaqbert Mar 2018 Strongly recommends
on HN thread No Longer a Secret: How Israel Destroyed Syria's Nuclear Reactor
In context, here is a great video from the Belfer center on nuclear bomb making and what are the hard parts [0]. Getting the fission material is the hard part, and in order to get plutonium nukes you need a enrichment plant, i.e. a reactor that is not meant to produce energy but breed plutonium. [0] [this video] (at min 47, he starts talking about the hard parts)
Explains nuclear bomb making and which parts are hard
@virgulino Sep 2024 Strongly recommends
on HN thread Did Sandia use a thermonuclear secondary in a product logo?
For anyone interested in the basics of nuclear weapons, I highly recommend the "Nuclear 101: How Nuclear Bombs Work" lectures by Matthew Bunn, a man heavily involved in nuclear arms control. His lectures are always highly entertaining, a real pleasure to watch. This is a clip from his lecture explaining the basics of thermonuclear warheads: [link] And the full “Nuclear 101” lecture, in two parts: [this video] [link]
Entertaining lectures on nuclear weapons basics by Matthew Bunn
@verdverm Jan 2023 Recommends
on HN thread Ask HN: What happens if a nuclear missile is air-destroyed before detonation?
[this video] has a good explanation of how nuclear weapons work. It may be possible that a missel is disabled and when it hits the ground, produces a much lower yield explosion than designed for, in particular a plutonium device, if I recall the video and extrapolate with sufficient accuracy
Good explanation of how nuclear weapons work
@nordsieck Nov 2024 Recommends
on HN thread El Capitan: New supercomputer is the fastest
> It's because of the way the weapons are designed, which requires a CNWDI clearance to know, so your curiosity is not likely to be sated. While that's true, the information that is online is surprisingly detailed. For example, this series "Nuclear 101: How Nuclear Bombs Work" [this video] [link]
Surprisingly detailed public information on weapon design

Citations, criticism and jokes

@espeed Mar 2019 Cites it
on HN thread Revolutionary Ideas in Science, Math, and Society [video]
On US soil you'd have fallout from the soil getting sucked up into the atmosphere. See... "Why World War II Matters - Victor Davis Hanson" [video] [link] Harvard Belfer Center: "Nuclear 101: How Nuclear Bombs Work Part 1/2" [video] [this video]
Harvard Belfer lecture on bombs

Video list and Hacker News comment labels from HackerTube (prompted by @karpathy), released under ODC-By 1.0, built on the open-index/hacker-news archive. Hacker News data is provided by Y Combinator; comments remain the work of their authors. Video titles, channel names and thumbnails belong to their creators and are shown via YouTube. HackerTube Watch is an unofficial edition. Data export of 2026-10-31.

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