Celebrating 10 Years of Foundational Questions in Physics and Cosmology!
FQXi’s most popular online content from the past decade

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FQXi launched in May 2006 to catalyze and support research on the foundations of physics and cosmology. To celebrate our 10th anniversary, we're showcasing our top 10 most popular articles, videos, podcasts, essays and the 10 hottest discussion topics at the frontiers of physics, for the past decade. Thank you to the FQXi community, including our contributors, funders and visitors to our site.

Top Articles | Top Videos | Top Podcast Stories | Top Forum & Blog Topics | Top Essays



"What is Consciousness?"

Christof Koch and Giulio Tononi

"Is Consciousness a State of Matter?"

Max Tegmark

"Is Time an Illusion?"

Julian Barbour

"Boltzmann Brains and Eternal Inflation"

Sean Carroll

"What is Time?"

David Eagleman, Paul Davies, Tim Maudlin, Raissa D'Souza and moderator Jennifer Ouellette.

"String Theory v Loop Quantum Gravity"

Carlo Rovelli and Raphael Bousso

"Complexity: Living Systems from Cells to Cities"

Geoffrey West

"Is the Multiverse Real?"

Max Tegmark

"Does Time Exist?"

Julian Barbour and Tim Maudlin


Hot Topics from Forums and Blogs

Classical Spheres, Division Algebras, and the Illusion of Quantum Non-Locality
Joy Christian

I wish to mention a recent preprint of mine---this one---which is about the prevalent (but false) belief in “quantum non-locality.” I am, in fact, required to post this link here, because this preprint is part of my forthcoming book on Bell’s Theorem and Quantum Entanglement, which is kindly supported by FQXi through a generous Let me begin by mentioning that Michael Atiyah---that wise old sage of mathematical physics---gave a provocative seminar last November, at IAS, Princeton, with the following thesis: There are four fundamental forces of nature, and there are four division rings over the reals (connected with the parallelizability of four classical spheres): the real numbers, the complex numbers, the quaternions, and the octonions. Therefore---according to Atiyah---one should expect all four of these division algebras to play a role in the ultimate theory of physics, allowing octonions, in particular, to account for gravitation. As one would expect from someone like Atiyah, this was not an idle speculation. He described some specific steps in this direction, substantiated his ideas, and made some deep connections. Now you may wonder what this has to do with quantum non-locality. Well, rather astonis...

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It is also worth noting that an incontrovertible proof that a distribution of N directions of angular momentum exist is already given by the rotationally invariant surfaces produced in this spectacular simulation.

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These are the 10 most popular essays, receiving the most hits from visitors, over the past decade. You can also read the winning essays in each of our contests, as chosen by expert judging panels, here

Compilation volumes containing expanded versions of the winning essays from some of our most recent contests are also available for purchase.

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