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How Well Does the Standard Model Explain the Universe? | Saul Perlmutter

2026-07-04 Education
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Closer To Truth
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Description

*Why do cosmologists believe they understand the history of the universe?* Saul Perlmutter explains the standard model of cosmology, how Lambda-CDM emerged as its leading version, what observations support it, and why new discoveries may still force important revisions. 0:00 The Standard Model of Cosmology 5:26 Why Lambda-CDM Became the Standard Model 6:54 The Evidence Supporting Lambda-CDM 10:09 Do James Webb Discoveries Challenge the Model? 12:49 How Secure Is Cosmic History? *Saul Perlmutter* is an American astrophysicist and Professor of Physics at the University of California, Berkeley. He was awarded the 2011 Nobel Prize in Physics for his groundbreaking discovery that the expansion of the universe is accelerating. His pioneering work has transformed our understanding of cosmology, including the study of dark energy and the evolution of the universe. *Resources:* * _Sense & Sensibility & Science_ — Saul's undergraduate course at UC Berkeley using the tools of science to improve everyday decision-making: https://sensibility.berkeley.edu * _Scientific Thinking for All: A Toolkit_ — a six-unit high school adaptation of the course, developed with the Lawrence Hall of Science and Nobel Prize Outreach: https://scientificthinking.lawrencehallofscience.org * _Third Millennium Thinking_ — Saul Perlmutter, John Campbell, and Robert MacCoun on the tools scientists use to avoid fooling themselves, applied to everyday decisions: https://thirdmillenniumthinking.com *More from Saul Perlmutter on Closer To Truth:* * Closer To Truth: The Podcast: https://www.youtube.com/playlist?list=PLFJr3pJl27pLLkP0kHQKL9nZh35UkgkR_ * Closer To Truth contributors: https://closertotruth.com/contributor/saul-perlmutter/ *Subscribe to Closer To Truth:* https://www.youtube.com/@CloserToTruthTV *Join the Community:* * Membership (5,000+ videos): https://closertotruth.com/register/ * Audio Podcast: https://closertotruth.podbean.com * Support the Show: https://closertotruth.com/donate/ * Official Merchandise: https://www.bonfire.com/store/closertotruth/ *Follow Us:* * Facebook: https://www.facebook.com/CloserToTruthTV/ * Instagram: https://www.instagram.com/closertotruth/ * X: https://x.com/CloserToTruth Closer To Truth, created and hosted by Robert Lawrence Kuhn, presents the world's greatest thinkers exploring humanity's deepest questions. Discover fundamental issues of existence and sentience. Engage new and diverse ways of thinking. Appreciate intense debates. Share your own opinions. Seek your own answers. #CloserToTruth #Cosmos #SaulPerlmutter #DarkEnergy #LambdaCDM

Top Comments (10)

@CloserToTruthTV 2026-06-19

*Saul Perlmutter explains how the standard model of cosmology developed, why Lambda-CDM became its dominant framework, and how new observations continue to test its limits.* Do you think cosmology is close to a complete picture of the universe, or are major surprises still ahead?

3 6 replies
@Maxwell-mv9rx 2026-07-04

He can not provide evidence for this issue. His argument is mostly baseless rethoric rather than ethoric the true.

3
@rootsradics 2026-07-04

They trace the cosmic history by looking through the night, Triangulating columns of the ancient, frozen light Convinced the Lambda-CDM has locked the system whole, To map the massive theater and calculate its soul. From baby pictures in the dust to exploding stellar spheres, They write a seamless narrative across the billion years. Yet Webb is finding giants where a shadow should have been, Defying all the timelines they had painted on the screen Proving that the software can compress the local slate, And build a mature galaxy right at the morning gate. The history they trust so much is shifting in its dress, Reflecting the anomalies they've started to confess. The experience knows the cosmic past is just a rendered line, Computed by the local brain to structure the design. The universe did not begin a vast expanse ago; It blossoms right before you in a single, static show. You are the timeless Canvas where the epochs rise and fall The history is a shadow; you're the light behind it all.

2 3 replies
@sanjeevjain5519 2026-07-04

The standard model and lambda cold dark matter are still the best theories we have got that explain the percentages of elements right in the cosmos. However, it is increasingly being challenged by Webb telescope early universe data.

2
@richardleetbluesharmonicac7192 2026-07-06

Whenever I see the word model, I cringe. The mechanics of it are awesome. However, it’s based on a flawed premise which is called a singularity which does not exist in an infinite universe. We used to change the model to match physics. Now we make physics around models. It’s really sad.

1
@gettaasteroid4650 2026-07-04

(7:40) "We know where the gold comes from" That's what Benjamin Franklin said; "The Golden Age was never the present age" 🎆 I think that Dr. Perlmutter is referring to LIGO observations from a 2017 neutron star merger, but a more recent study into gamma rays going back to 2004 ESA's INTEGRAL data reveals magnetar flares are powerful enough to shake up r-process reactions, so we don't know exactly where all the early universe gold comes from but it's still bascially r-process and s-process quotient reliable

1
@MrJPI 2026-07-05

Perlmutter is a bit modest saying that we can ROUGHLY calculate the percentages of different elements and their isotopes. For H and He4 the accuracy is better than 0.5%, so 1 part per 200. For amount of Deuterium D it is a few percent. For Lithium the uncertainty is much bigger. The rest of the elements are practically not produced at all.

1
@dennisbailey6067 2026-07-07

Why the 3 generations of particles?🤨

0
@S3RAVA3LM 2026-07-04

The title question may depend on the students degree of significance concerning the great archtype in truth. Cosmogony includes cosmology(strict scientific inquiry) while utilizing higher languages such as myth and metaphor, deep metaphysical insight based on principles and engaging into the dialectic, whereas cosmology excludes cosmogony and keeps it based on the level of sense perception organs setting them as criterion.

0
@dammitdan106 2026-07-05

Now I want to have a basic working knowledge of Λ-CDM and enjoy it.

0

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