The Biggest Ideas in the Universe | 6. Spacetime
The Biggest Ideas in the Universe is a series of videos where I talk informally about some of the fundamental concepts that help us understand our natural world. Exceedingly casual, not overly polished, and meant for absolutely everybody. This is Idea #6, "Spacetime." Which, naturally, is about the major idea underlying special relativity -- that both space and time are different parts of one unified, four-dimensional spacetime. Learn the real reason why two twins age differently if one stays home and the other zips out near the speed of light. My web page: http://www.preposterousuniverse.com/ My YouTube channel: / seancarroll Mindscape podcast: http://www.preposterousuniverse.com/p... The Biggest Ideas playlist: • The Biggest Ideas in the Universe: Introdu... Blog posts for the series: http://www.preposterousuniverse.com/b... Background image: https://www.amazon.com/Spacetime-Geom... #science #physics #ideas #universe #learning #cosmology #philosophy #math #spacetime #relativity
The Biggest Ideas in the Universe | 7. Quantum Mechanics
The Biggest Ideas in the Universe | Q&A 6 - Spacetime
🌍NASA ISS Live Feed: Real-Time Views of Earth from the Space Station 4K 🚀 June 7 2026
The Biggest Ideas in the Universe | 5. Time
I finally understood why time even exists! (My mind is blown)
The Hardest Questions in Physics | World Science Festival
The secrets of Einstein's unknown equation – with Sean Carroll
String Theory, Multiverse, and Divine Design - Brian Greene
How Can SPACE and TIME be part of the SAME THING?
The Biggest Ideas in the Universe | 13. Geometry and Topology
At the limits of astrophysics – with Katy Clough
The Biggest Ideas in the Universe | 23. Criticality and Complexity
The Biggest Ideas in the Universe | 8. Entanglement
The problem with pretending quantum mechanics makes sense | Sean Carroll
The Biggest Ideas in the Universe | Q&A 5 - Time
Juan Maldacena Public Lecture: The Meaning of Spacetime
Sean Carroll | The Passage of Time & the Meaning of Life
The Biggest Ideas in the Universe | 20. Entropy and Information
The Tiny Donut That Proved We Still Don't Understand Magnetism
