Physics for Everyone, Lecture 3: Motion, from Galileo to Dark Mysteries
We usually begin the study of physics with a discussion of motion, not because it is easy, or because the modern understanding of motion began with Galileo hundreds of years ago. Rather, Galileo’s groundbreaking work provides a paradigm to understand how physics is done today. Extracting out the fundamental essence of motion from all the distractions associated with what turn out to be irrelevant complexities was a monumental intellectual leap for humankind—a leap we often take for granted.
Without the leap, for example, Newton could never have made his profound discoveries about the relationship between force and movement, nor his discovery of the Universal Law of Gravitation.
But too often we treat these remarkable achievements as something belonging in antiquity.. as if we have moved far beyond them in every way. Nothing could be further from the truth. Applying the very same ideas that Galileo and Newton developed leads us to the cusp of modern physics: the discovery of the dominant mass in the Universe, a vast invisible sea of dark matter. In this episode, we travel over 450 years of physics, from Galileo, to the threshold of our understanding of the cosmos today. Hang onto your hats.
I’m also pleased to share a quick PSA. A reminder of our 2026 Origins expedition through the Greek archipelago (July 24 to 31), with a Cyprus add-on (July 17 to 22). If you’re interested, it’s worth raising your hand early. These trips tend to fill quickly. Express interest at
https://originsproject.org/greek-adventure-2026-application/
As always, an ad-free video version of this podcast is also available to paid Critical Mass subscribers. Your subscriptions support the non-profit Origins Project Foundation, which produces the podcast. The audio version is available free on the Critical Mass site and on all podcast sites, and the video version will also be available on the Origins Project YouTube.
Get full access to Critical Mass at lawrencekrauss.substack.com/subscribe
Available Results
Generated results are saved to the knowledge database for reuse and search.
Extract Knowledge
Pick what you want extracted first. Model, scope, and chapter options appear after a template is selected.
Transcript
The Origins Podcast with Lawrence Krauss Physics for Everyone, Lecture 3: Motion, from Galileo to Dark Mysteries 3 1× 0:00 Current time: 0:00 / Total time: -1:03:21 -1:03:21 Audio playback is not supported on your browser. Please upgrade. Physics for Everyone, Lecture 3: Motion, from Galileo to Dark Mysteries Extracting from the most complex phenomena in nature, the simple essence of motion created the paradigm that established modern physics, and also helped uncover a cosmic mystery. Lawrence M. Krauss Apr 14, 2026 3 Share Transcript Subscribe We usually begin the study of physics with a discussion of motion, not because it is easy, or because the modern understanding of motion began with Galileo hundreds of years ago. Rather, Galileo’s groundbreaking work provides a paradigm to understand how physics is done today. Extracting out the fundamental essence of motion from all the distractions associated with what turn out to be irrelevant complexities was a monumental intellectual leap for humankind—a leap we often take for granted. Without the leap, for example, Newton could never have made his profound discoveries about the relationship between force and movement, nor his discovery of the Universal Law of Gravitation. But too often we treat these remarkable achievements as something belonging in antiquity.. as if we have moved far beyond them in every way. Nothing could be further from the truth. Applying the very same ideas that Galileo and Newton developed leads us to the cusp of modern physics: the discovery of the dominant mass in the Universe, a vast invisible sea of dark matter. In this episode, we travel over 450 years of physics, from Galileo, to the threshold of our understanding of the cosmos today. Hang onto your hats. I’m also pleased to share a quick PSA. A reminder of our 2026 Origins expedition through the Greek archipelago (July 24 to 31), with a Cyprus add-on (July 17 to 22). If you’re interested, it’s worth raising your hand early. These trips tend to fill quickly. Express interest at https://originsproject.org/greek-adventure-2026-application/ Share Critical Mass As always, an ad-free video version of this podcast is also available to paid Critical Mass subscribers. Your subscriptions support the non-profit Origins Project Foundation, which produces the podcast. The audio version is available free on the Critical Mass site and on all podcast sites, and the video version will also be available on the Origins Project YouTube. Subscribe Discussion about this episode Comments Restacks The Origins Podcast with Lawrence Krauss The Origins Podcast features in-depth conversations with some of the most interesting people in the world about the issues that impact all of us in the 21st century. Host, theoretical physicist, lecturer, and author, Lawrence M. Krauss, will be joined by guests from a wide range of fields, including science, the arts, and journalism. The topics discussed on The Origins Podcast reflect the full range of the human experience - exploring science and culture in a way that seeks to entertain, educate, and inspire. lawrencekrauss.substack.com The Origins Podcast features in-depth conversations with some of the most interesting people in the world about the issues that impact all of us in the 21st century. Host, theoretical physicist, lecturer, and author, Lawrence M. Krauss, will be joined by guests from a wide range of fields, including science, the arts, and journalism. The topics discussed on The Origins Podcast reflect the full range of the human experience - exploring science and culture in a way that seeks to entertain, educate, and inspire. lawrencekrauss.substack.com Subscribe Listen on Substack App RSS Feed Appears in episode Lawrence M. Krauss Recent Episodes What's New in Science With Sabine and Lawrence | Ghost Murmers, New Wires, Cosmic Questions, And AI cures? Apr 24 • Lawrence M. Krauss Katie Herzog: The Science Behind Drinking To Get Sober Mar 23 • Lawrence M. Krauss What's New in Science With Sabine and Lawrence | Fusion Dark Matter, String Theory in Biology, and Rapid Evolution Feb 13 • Lawrence M. Krauss Physics for Everyone, Lecture 2: The Gestalt of Physics, Tools for Seeing Jan 22 • Lawrence M. Krauss What's New in Science With Sabine and Lawrence| New Year's Edition: Big ideas, precision measurements, and prebiotic molecules. Dec 31, 2025 • Lawrence M. Krauss The Like Button, and the Strange Power of Tiny Ideas | Martin Reeves Dec 22, 2025 • Lawrence M. Krauss Polarization, Powerlessness, and what We can Actually Do Nov 29, 2025 • Lawrence M. Krauss