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

Bookmark and Share

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



"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

"Is Consciousness a State of Matter?"

Max Tegmark

"Is Time an Illusion?"

Julian Barbour

"Neural Relativity"

David Eagleman

"Boltzmann Brains and Eternal Inflation"

Sean Carroll

"What is Time?"

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


Hot Topics from Forums and Blogs

"Spookiness" Confirmed by the First Loophole-Free Quantum Test
Zeeya Merali

Spookiness, it seems, is here to stay. Quantum theory has been put to its most stringent “loophole free” test yet, and it has come out victorious, ruling out more common sense views of reality (well, mostly). Many thanks to Matt Leifer for bringing this experiment -- by a collaboration of researchers in the Netherlands, Spain, and the UK -- to my attention (Quantum Mechanics Braces for the Ultimate Test.") In that article, I quote quantum physicist and FQXi member Nicolas Gisin saying: “This race is on because the group that performs the first loophole-free test will have an experiment that stands in history.” We may now have a winner. The test is a version of an experiment set out in the 1960s, by Irish physicist John Bell. He came up with a way of working out whether nature was really as spooky as it seems on the quantum level, or if a more common sense explanation was p...

Comment on this Topic

Please read the important Introduction that governs your participation in this community. Inappropriate language will not be tolerated and posts containing such language will be deleted. Otherwise, this is a free speech Forum and all are welcome! view instructions

Your name: (optional)

Recent Comments


Unfortunately you didn't take part in the last essay contest. I feel the timespan insufficient for carefully reading so many essays, reading the comments, and thoroughly discussing the most relevant arguments. Even D. Traill was not yet aware of your paper. Others mentioned J. Christian. A. Kadin was sadly affected by the dead of his mother. I consider some arguments by Klingman, by Szangelois, by Bollinger, by Watson, and by De Santos perhaps either relevant or indicating weakness....

“Spookiness” Confirmed as a Misunderstood Classical Phenomenon

Rob McEachern

read all comments
Click here to see another of our top forum topics


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.

Please enter your e-mail address:

Note: Joining the FQXi mailing list does not give you a login account or constitute membership in the organization.