physics

Sabine Hossenfelder

Sabine Hossenfelder is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sabine Hossenfelder rather than just read about it. In short: Sabine Karin Doris Hossenfelder is a German theoretical physicist, science communicator, writer, and YouTuber. After working as an academic physicist for two decades, Hossenfelder rose to prominence on YouTube in the early 2020s, gaining over 1.7 million subscribers by 2025.

Key takeaways

Sabine Hossenfelder belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sabine Hossenfelder to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sabine Hossenfelder from memory before moving on to harder problems.

Reference excerpt

Sabine Karin Doris Hossenfelder is a German theoretical physicist, science communicator, writer, and YouTuber. After working as an academic physicist for two decades, Hossenfelder rose to prominence on YouTube in the early 2020s, gaining over 1.7 million subscribers by 2025. Hossenfelder is known for her controversial criticism of modern physics research.

Early life and education Hossenfelder was born in Frankfurt. Hossenfelder initially earned an undergraduate degree in mathematics at Goethe University Frankfurt. Hossenfelder later earned a doctorate from the same university in theoretical physics in 2003; her dissertation, supervised by Horst Stöcker, studied microscopic black-hole production in models with large extra dimensions.

Academic career After post-doctoral posts at the GSI Helmholtz Centre for Heavy Ion Research, University of Arizona, UC Santa Barbara and Perimeter Institute in Canada, she joined NORDITA in Stockholm as an assistant professor in 2009. In 2015, she moved to the Frankfurt Institute for Advanced Studies, where she led the Analog Systems for Gravity Duals group and, in 2019, received the institute's inaugural Award for Innovative Thinking. In 2023, she became affiliated with the LMU Munich Center for Mathematical Philosophy, where she researched the role of locality and fine-tuning in quantum-mechanical foundations; LMU ended its affiliation with Hossenfelder in 2025. Hossenfelder has published research on topics such as quantum gravity, black holes, and dark matter.

Public engagement Hossenfelder has written the popular-science blog Backreaction since 2006 and has contributed articles to Nature, New Scientist and Quanta Magazine. Her first trade book, Lost in Math: How Beauty Leads Physics Astray (Basic Books, 2018), argues that an aesthetic preference for mathematically "beautiful" theories has hindered progress in fundamental physics. Her follow-up, Existential Physics: A Scientist's Guide to Life's Biggest Questions, was published by Viking in 2022, covering topics such as ... meaning of everything, including life and death, the origin of the universe, and the nature of reality ... God and spirituality, free will, universal consciousness, dualism (whether the mind is separate from the body), the Big Bang theory about the origin of the cosmos, the possible existence of parallel universes, and whether we live in a computer simulation.In a positive review, Kirkus Reviews stated that the book suggests that "many spiritual ideas are compatible with modern physics". During the COVID-19 pandemic in the early 2020s, Hossenfelder began focusing on YouTube content attempting to explain science in simple terms. Jonathan Jarry stated that Hossenfelder was "gifted at explaining complexity [in her YouTube videos] without sacrificing nuance". Hossenfelder's videos gained significant traction; by late 2023 she had reached over one million YouTube subscribers. By April 2024, she had left full-time academic employment and became a full-time YouTuber. As of 2025, her channel had reached 1.72 million subscribers and 293 million total views. Hossenfelder is known for her strong criticism of modern academic physics research. As of 2025, according to Jonathan Jarry, her output criticizing modern academic research generally garnered more popular engagement than her more educational efforts. She has written op-eds in The Guardian and The New York Times critiquing particle physics and the search for hypothesized particles using colliders. In her videos, she criticizes trends in particle physics research and accuses some of her colleagues of misleading the public, wasting research funds on "useless" papers, or lacking academic integrity. Critics contend that her presentation of these topics is exaggerated and misleading, and may encourage conspiratorial thinking and undermine both the perceived legitimacy of physics as a discipline and public trust in science more broadly. National Public Radio (the United States’ public radio broadcaster) described her views of modern physics research as "somewhat contrarian", while Daniel Kagan-Kans, writing in The Wall Street Journal, described her as part of a genre of "conspiracy physics" YouTubers alongside figures like Eric Weinstein.

Honours FIAS Award for Innovative Thinking (2019)

Selected publications Lost in Math: How Beauty Leads Physics Astray. Basic Books (2018). ISBN 978-0-465-09426-4. Existential Physics: A Scientist's Guide to Life's Biggest Questions. Viking (2022). ISBN 978-1-9848-7945-5. Hossenfelder, Sabine; Palmer, Tim (6 May 2020). "Rethinking Superdeterminism". Frontiers in Physics. 8 139. arXiv:1912.06462. Bibcode:2020FrP.....8..139P. doi:10.3389/fphy.2020.00139. ISSN 2296-424X.

References

External links Official website Sabine Hossenfelder's channel on YouTube

Illustrations

Worked examples

Example 1 — a first encounter with Sabine Hossenfelder

Start with the simplest possible case. Write down what Sabine Hossenfelder claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sabine Hossenfelder before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sabine Hossenfelder ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sabine Hossenfelder

In research: Sabine Hossenfelder appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Sabine Hossenfelder in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Sabine Hossenfelder is common in secondary-school and first-year university syllabi. It links to neighbouring topics 21st-century German physicists, 21st-century German women physicists, 21st-century German women scientists, so understanding it makes those chapters shorter.
In everyday life: Look for Sabine Hossenfelder outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Sabine Hossenfelder in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sabine Hossenfelder means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Sabine Hossenfelder out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sabine Hossenfelder in simple terms?

Why does Sabine Hossenfelder matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sabine Hossenfelder?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sabine Hossenfelder.