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Dark Matter: The Situation has Changed

Sabine Hossenfelder · 829.9K views · 2021-05-01 · 11:50

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Overview

Sabine Hossenfelder explains how her opinion on dark matter has shifted, weighing the evidence for and against it and the case for modified gravity. It runs through what dark matter is and why it has not been detected.

On Hacker News

Recommended as an accessible, curious-undergraduate-level overview of dark matter and its alternatives.

Recommended by 2 HN people across 2 months · HN mentions 2021–2023

Topics

Cosmology & astrophysics
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dark mattermodified gravityastrophysicscosmologyhossenfelder

What people said

tlholaday · 2023-02 · Recommendation

> correct me if I’m wrong … I think you’re oversimplifying, like seeing a forest and overlooking that it’s Prototaxites, not Malus domestica. Here’s Sabine Hossenfelder’s curious-undergraduate-level history of Dark Matter theories: [VIDEO] Proper nouns include Renzo’s Rule and Baryonic Tully Fisher Relation.

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keithnz · 2021-05 · Recommendation

Sabine is a great science (physics) communicator to the "masses", she recently did an update on dark matter. [VIDEO]

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astrange · 2022-03 · Reference

They're "actually" what QFT says they are, but the rest isn't wrong either. It's not wrong to say "a house exists" because it's actually a pile of bricks in the shape of a house. Dark matter must be "matter" if it exists, because there's not a category of things that aren't matter. [VIDEO]

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Sources

Video by Sabine Hossenfelder, played through YouTube.

Data and selection notes

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HN Library: HackerTube export (2026-10-31) and open-index/hacker-news. Upstream summaries and classifications may contain AI errors.

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