Uploaded June 2026 | Updated September 2026, 2 weeks ago
*If the evidence for dark matter is strong, why does the mystery remain unsolved?*
Saul Perlmutter explains how galaxy rotation curves, weak gravitational lensing, and decades of observations revealed large amounts of unseen mass in the universe. He also explores why direct detection efforts have so far come up empty and why alternative explanations remain under discussion.
0:55 The Discovery of Missing Mass
1:56 The Search for Dark Matter Particles
3:28 How Confident Are Scientists?
4:18 What Remains Uncertain About Dark Matter
6:24 What Does the Scientific Community Think?
*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: 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: thirdmillenniumthinking.com
*More from Saul Perlmutter on Closer To Truth:*
* Closer To Truth: The Podcast: youtube.com/playlist?list=PLFJr3pJl27pLLkP0kHQKL9nZh35UkgkR_
* Closer To Truth contributors: closertotruth.com/contributor/saul-perlmutter
*Subscribe to Closer To Truth:* youtube.com/@CloserToTruthTV
*Join the Community:*
* Membership (5,000+ videos): closertotruth.com/register
* Audio Podcast: closertotruth.podbean.com
* Support the Show: closertotruth.com/donate
* Official Merchandise: bonfire.com/store/closertotruth
*Follow Us:*
* Facebook: facebook.com/CloserToTruthTV
* Instagram: instagram.com/closertotruth
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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 #DarkMatter #VeraRubin
*If the evidence for dark matter is strong, why does the mystery remain unsolved?*
Saul Perlmutter explains how galaxy rotation curves, weak gravitational lensing, and decades of observations revealed large amounts of unseen mass in the universe. He also explores why direct detection efforts have so far come up empty and why alternative explanations remain under discussion.
0:55 The Discovery of Missing Mass
1:56 The Search for Dark Matter Particles
3:28 How Confident Are Scientists?
4:18 What Remains Uncertain About Dark Matter
6:24 What Does the Scientific Community Think?
*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: 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: thirdmillenniumthinking.com
*More from Saul Perlmutter on Closer To Truth:*
* Closer To Truth: The Podcast: youtube.com/playlist?list=PLFJr3pJl27pLLkP0kHQKL9nZh35UkgkR_
* Closer To Truth contributors: closertotruth.com/contributor/saul-perlmutter
*Subscribe to Closer To Truth:* youtube.com/@CloserToTruthTV
*Join the Community:*
* Membership (5,000+ videos): closertotruth.com/register
* Audio Podcast: closertotruth.podbean.com
* Support the Show: closertotruth.com/donate
* Official Merchandise: bonfire.com/store/closertotruth
*Follow Us:*
* Facebook: facebook.com/CloserToTruthTV
* Instagram: 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 #DarkMatter #VeraRubin
