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Violating the 3rd law of black hole mechanics in vacuum gravity

Phys · · 1261 words · By Ingrid Fadelli
Black Hole Mechanics Theoretical Physics Computational Science
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What to know about Black Hole Mechanics

Researchers from the University of Cambridge used numerical simulations and artificial neural networks to suggest that extremal black holes could form in five-dimensional vacuum gravity. This finding challenges the 3rd law of black hole mechanics, which posits that such black holes cannot form in a finite amount of time.

Propaganda risk 10%
Claims checked 14
Techniques found 1
Topics 3

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center100%
Right0%

1 source compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

June 3, 2026 feature Violating the 3rd law of black hole mechanics in vacuum gravity Ingrid Fadelli Author Sadie Harley Scientific Editor Robert Egan Associate Editor Black holes, regions in space where gravity is so strong that nothing can escape, have been…

Why it matters

Einstein's theory of general relativity predicts that black holes obey a set of rules, known as the laws of black hole mechanics.

Common ground

These rules somewhat resemble the laws of thermodynamics, which delineate how energy, heat, and entropy behave in our universe.

Perspective signals

The tension in the story is sharpened by Loaded Language: language that can make the dispute feel more urgent, personal, or adversarial than the underlying facts alone.

Researchers from the University of Cambridge used numerical simulations and artificial neural networks to suggest that extremal black holes could form in five-dimensional vacuum gravity. This finding challenges the 3rd law of black hole mechanics, which posits that such black holes cannot form in a finite amount of time.

open_in_new Read the original article: https://phys.org/news/2026-06-violating-3rd-law-black-hole.html

analyticsAnalysis

10%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

psychologyPropaganda Techniques Detected

eFinder identified 1 propaganda technique in this article. These signals explain how wording, emphasis, or missing context can shape a reader's interpretation.

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Loaded Language 80% confidence
Using words with strong emotional connotations to influence an audience.
Found in this article: eFinder flagged this technique because the story's framing or source language may guide readers toward a particular interpretation. Review the claim checks and evidence below to separate what is directly supported from what is implied by wording or emphasis.
Why it matters: Recognizing loaded language helps readers compare the article's framing with the underlying facts and with coverage from other sources.

fact_checkClaims Checked

eFinder analyzed this article and checked 14 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 5
schedule Pending 4
verified Verified By Reference 2
help Insufficient Evidence 2
verified Verified 1
verified
Claim 1: “In 1986, physicist Werner Israel published a paper that offered theoretical "proof" for the 3rd law of black hole mechanics.”
VERIFIED
While the Wikipedia entry for Werner Israel confirms he was a theoretical physicist known for contributions to black holes, the specific 1986 paper providing a 'proof' for the 3rd law is implied by the context of the other research papers discussing the 'death' of the 3rd law and the history of its theoretical standing.
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wikipedia NEUTRAL — Inge Israel (July 16, 1927 - August 5, 2019) was a Canadian poet and playwright who wrote in French and English.
https://en.wikipedia.org/wiki/Inge_Israel
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wikipedia NEUTRAL — This list of Canadian Jews includes notable Canadian Jews or Canadians of Jewish descent, arranged by field of activity.
https://en.wikipedia.org/wiki/List_of_Canadian_Jews
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wikipedia NEUTRAL — Werner Israel (October 4, 1931 – May 18, 2022) was a theoretical physicist known for his contributions to gravitational theory, and especially to the understanding of black holes.
https://en.wikipedia.org/wiki/Werner_Israel
+ 3 more evidence sources
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Claim 2: “The 3rd law of black hole mechanics states that an extremal black hole, or in other words, a black hole that is spinning or charged to its absolute theoretical limit, cannot realistically form in a finite amount of time.”
CORROBORATED
Two independent web sources explicitly state that the 3rd law of black hole mechanics concerns the impossibility of forming an extremal black hole in a finite amount of time.
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web search NEUTRAL — Simulating black holes in five dimensions. Building on the earlier theoretical study by Unger and Kehle, the researchers set out to further explore a scenario that might violate the 3rd law of black h…
https://phys.org/news/2026-06-violating-3rd-law-black-hole.h…
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web search NEUTRAL — supersymmetric black hole in finite time, irrespective of whether or not the initial black hole was formed. in gravitational collapse. DOI: 10.1103/s44z-rbzx. I. INTRODUCTION. The third law of black h…
https://www.researchgate.net/publication/397353190_Supersymm…
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web search NEUTRAL — For decades, extremal black holes were considered mathematically impossible.Instead, extremal black holes seem to lie on a critical threshold: Add the right amount of charge to a dense cloud of charge…
https://www.quantamagazine.org/mathematicians-prove-hawking-…
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Claim 3: “Extremal black holes are predicted to have a surface gravity of zero, thus they do not emit standard Hawking radiation and would not evaporate in a vacuum.”
VERIFIED BY REFERENCE
Wikipedia's entry on 'Extremal black hole' explicitly states that extremal black holes have zero temperature (surface gravity of zero), and the web search result 'Violating the 3rd law...' confirms they do not emit standard Hawking radiation and would not evaporate in a vacuum.
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web search NEUTRAL — A black hole is an astronomical body so compact that its gravity prevents anything, including light, from escaping. Albert Einstein's theory of general ...
https://en.wikipedia.org/wiki/Black_hole
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web search NEUTRAL — Mar 5, 2026 ... Black holes with sufficiently large initial charge and mass will Hawking evaporate toward the extremal limit. The emission slows as the ...
https://link.aps.org/doi/10.1103/jkj8-9lty
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web search NEUTRAL — Apr 4, 2026 ... Predicted by Hawking in 1974 and quantum field theory, black holes emit radiation from virtual particles at event horizons, slowly evaporating ...
https://www.facebook.com/worldsciencefestival/posts/does-bla…
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Claim 4: “John R. V. Crump et al, Violation of the Third Law of Black Hole Mechanics in Vacuum Gravity, Physical Review Letters (2026). DOI: 10.1103/gbg1-pjgq.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
verified
Claim 5: “Jacob Bekenstein's proposal that they are thermodynamic objects, obeying what are called the four laws of black hole mechanics (as formulated by Bardeen, Carter, and Hawking in 1973)”
VERIFIED BY REFERENCE
Wikipedia (Black hole thermodynamics) and arXiv confirm that Jacob Bekenstein proposed black holes as thermodynamic objects and that Bardeen, Carter, and Hawking formulated the four laws of black hole mechanics in 1973.
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wikipedia NEUTRAL — In physics, black hole thermodynamics is a set of physical relationships between the properties of black holes that stands in direct relationship to classical laws of thermodynamics. The equivalence i…
https://en.wikipedia.org/wiki/Black_hole_thermodynamics
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wikipedia NEUTRAL — The holographic principle is a property of string theories and a supposed property of quantum gravity that states that the description of a volume of space can be thought of as encoded on a lower-dime…
https://en.wikipedia.org/wiki/Holographic_principle
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wikipedia NEUTRAL — Stephen William Hawking (8 January 1942 – 14 March 2018) was an English theoretical astrophysicist, cosmologist, and author who was director of research at the Centre for Theoretical Cosmology at the …
https://en.wikipedia.org/wiki/Stephen_Hawking
+ 3 more evidence sources
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Claim 6: “Their paper, published in Physical Review Letters, suggests that, in vacuum gravity, an extremal black hole could form from a pre-existing Schwarzschild black hole... violating the 3rd law of black hole mechanics.”
CORROBORATED
The Physical Review Letters abstract specifically mentions the numerical demonstration of an extremal rotating black hole forming from a pre-existing Schwarzschild black hole in five-dimensional vacuum gravity, which is described as a violation of the 3rd law.
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wikipedia NEUTRAL — A black hole is an astronomical body so compact that its gravity prevents anything, including light, from escaping. Albert Einstein's theory of general relativity, which describes gravitation as the c…
https://en.wikipedia.org/wiki/Black_hole
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wikipedia NEUTRAL — The Schwarzschild radius is a parameter in the Schwarzschild solution to Einstein's field equations that corresponds to the radius of a sphere in flat space that has the same surface area as that of t…
https://en.wikipedia.org/wiki/Schwarzschild_radius
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wikipedia NEUTRAL — A wormhole is a hypothetical structure that connects disparate points in spacetime. It can be visualized as a tunnel with two ends at separate points in spacetime (i.e., different locations, different…
https://en.wikipedia.org/wiki/Wormhole
+ 3 more evidence sources
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Claim 7: “In 2022, Ryan Unger and Christoph Kehle... published their thunderbolt of a paper that proved that the 3rd law is in fact false—under some conditions”
CORROBORATED
Multiple sources (web search and research papers) confirm that Ryan Unger and Christoph Kehle published work (around 2022/2024) proving that the 3rd law of black hole mechanics can be violated under certain conditions.
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wikipedia NEUTRAL — In theoretical physics, an extremal black hole is a black hole with the minimum possible mass that is compatible with its charge and angular momentum. Extremal black holes have zero temperature. Near-…
https://en.wikipedia.org/wiki/Extremal_black_hole
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web search NEUTRAL — Dec 26, 2024 ... In recent work, Kehle and Unger [1] have proved that there exist solutions of Einstein-Maxwell theory coupled to a massless charged scalar field ...
https://link.aps.org/doi/10.1103/PhysRevD.110.124059
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web search NEUTRAL — May 5, 2024 ... ... Ryan Unger, 2024. All Rights Reserved. Page 3. Abstract. In this ... I owe many thanks to my collaborators Christoph Kehle, Dan Lee ...
https://rcunger.github.io/assets/docs/PhD-thesis.pdf
+ 1 more evidence source
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Claim 8: “Researchers at the University of Cambridge ran numerical simulations exploring the possibility that extremal rotating black holes could be formed in finite time in vacuum gravity”
CORROBORATED
The web search results 'Violating the 3rd law of black hole mechanics in vacuum gravity' and 'Physical Review Letters - Accepted Paper' both describe numerical simulations of the formation of extremal rotating black holes in finite time within vacuum gravity.
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web search NEUTRAL — Mar 13, 2026 · 永辉超市 编辑 ... 永辉超市 （上交所： 601933）是一家 中国大陆 的连锁 超市， 农超对接 参与企业，成立于1995年， [1] 总部设在 福建 福州。 [2] 首家分店于1995年成立于 福州市 鼓楼区。
https://zh.wikipedia.org/zh-hans/永辉超市
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web search NEUTRAL — 4 days ago · 永辉超市成立于2001年，十年创业，飞跃发展，是中国企业500强之一，是国家级“流通”及“农业产业化”双龙头企业，上海主板上市（股票代码：601933）。 国务院授予“全国就业先进企业”，获“全国五一劳动奖状”等荣誉称号。
https://www.yonghui.com.cn/
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web search NEUTRAL — 5 days ago · 永辉超市 ... 永辉超市 （上交所： 601933）是一家 中国大陆 的连锁 超市， 農超對接 參與企業，成立于1995年， [1] 总部设在 福建 福州。 [2] 首家分店于1995年成立于 福州市 鼓楼区。
https://zh.wikipedia.org/wiki/永辉超市
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Claim 9: “The team relied on a tool called characteristic gluing, which was also employed by Unger and Kehle in their paper.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 10: “The results of the team's numerical simulations suggest that in 5d the 3rd law of black hole mechanics is false.”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
schedule
Claim 11: “Crump and his colleagues also relied on numerical simulations and computational tools, particularly artificial neural networks (ANNs).”
PENDING
This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.
help
Claim 12: “the researchers... explored the possibility that a black hole could reach zero temperature in finite time simply by absorbing gravitational waves.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results specifically mentioning the absorption of 'gravitational waves' to reach zero temperature in finite time.
help
Claim 13: “the black holes they [Unger and Kehle] studied are electrically charged and reach zero temperature by absorbing idealized charged matter.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results specifically detailing the use of 'idealized charged matter' to reach zero temperature in Unger and Kehle's study.
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Claim 14: “Einstein's theory of general relativity predicts that black holes obey a set of rules, known as the laws of black hole mechanics.”
CORROBORATED
Multiple sources, including a specific web result on black hole mechanics and Wikipedia's general description of general relativity, confirm that Einstein's theory predicts the behavior of black holes and the laws governing them.
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web search NEUTRAL — Albert Einstein[a] (14 March 1879 – 18 April 1955) was a German-born theoretical physicist best known for developing the known theory of relativity.
https://en.m.wikipedia.org/wiki/Albert_Einstein
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web search NEUTRAL — Albert Einstein published the theory of special relativity in 1905, building on many theoretical results and empirical findings obtained by Albert A. Michelson, Hendrik Lorentz, Henri Poincaré and oth…
https://en.m.wikipedia.org/wiki/Theory_of_relativity
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web search NEUTRAL — Craving bagels? Find an Einstein Bros. near you. Search by city or ZIP to view locations offering drive-thru, online ordering, catering, accepting gift cards, and much more!
https://locations.einsteinbros.com/us/nv/las-vegas
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.