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



"Is Time an Illusion?"

Julian Barbour

"Complexity: Living Systems from Cells to Cities"

Geoffrey West

"Boltzmann Brains and Eternal Inflation"

Sean Carroll

"Is the Multiverse Real?"

Max Tegmark

"Is Consciousness a State of Matter?"

Max Tegmark

"What is Consciousness?"

Christof Koch and Giulio Tononi

"Neural Relativity"

David Eagleman

"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


Hot Topics from Forums and Blogs

Wavefunction Collapse Demystified
Garrett Lisi

There has always been an aura of mystical speculation surrounding quantum mechanics and the role of consciousness. The interpretation of wave function collapse (usually referred to as "the measurement problem") seems to lie at the heart of it. So, I'd like to consider the following: The role of the observer making an observation in quantum mechanics is the same as that of a classical observer making an observation of a system that may inhabit one of a number of possibilities. You look at it, and then you know what happened -- until you look at it, you don't know and can only assign probabilities to what may have happened. The weirdness of quantum mechanics is that the possibilities interfere with one another, whereas classically they don't. I'm curious if others here would agree or disagree with this description, and how it might need to be amended or changed?

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Hello everyone! I hope that I have entered the correct forum. :-)

I am a teacher of physics by occupation. I was invited to write a script and work on the visualizations for the new popular science documentary film on the topic of Laws of Nature and whether they are changing. I wrote a draft with perhaps a few additional sentences interspersed. I would like to invite you all to view the draft and discuss it in FQXI forum (or whichever way you prefer).

You can view it here...

I wrote in my site detailed explanations of how I see a fundamental role of observers in wave function collapse, and big problems I see with the main other interpretations (especially Bohmian mechanics, but also many-worlds and spontaneous collapse). See also my essay in this 2015 contest : A Mind/Mathematics Dualistic Foundation of Physical Reality that includes the main points and other aspects of this interpretation.

Sorry Darius M, I could not read your paper to see how much we may...

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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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