time

An Interview with Emily Adlam [Video]

Spooky influences might leap not just across space, but across time, too.

The mysteries of quantum mechanics are usually portrayed as mysteries of space: how strange that the fates of particles on opposite sides of the universe could be joined. But they are also mysteries of time. A particle you create today could be connected in some unaccountable way to one that does not exist yet. Einstein […]

An Interview with Thanu Padmanabhan [Video]

“Atoms” of space are too small to see, but betray themselves indirectly.

I’m fascinated by how the humblest observations can lead you to the profoundest conclusions, and here’s one I learned from Thanu Padmanabhan, an eminent theoretical physicist at the Inter-University Centre for Astronomy and Astrophysics in Pune, India. Suppose you cup your hands around a glass of cold water to warm it up. From this simple […]

What Would It Mean for Time to Come to an End? [Video]

A TEDx talk in 2013

Could time come to an end? What would that even mean? In April 2013 I gave a talk about this strange physics idea at a TEDx event in Trento, Italy, based on a Scientific American article I wrote in 2010. My conceit was that time’s end poses a paradox that might be resolved if time […]

Where Do Space and Time Come From? New Theory Offers Answers, If Only Physicists Can Figure It Out

Vasiliev theory might extend string-theoretic ideas to new settings. But dang, is it hard.

SANTA BARBARA—”Maybe we’re just too dumb,” Nobel laureate physicist David Gross mused in a lecture at Caltech two weeks ago. When someone of his level wonders whether the unification of physics will always be beyond mortal minds, it gets you worried. (He went on to explain why he doesn’t think we are too dumb, though.) […]

The Emperor, Darth Vader and the Ultimate Ultimate Theory of Physics

This physics theory is like Darth Vader: you think it’s the ultimate power, until you meet the Emperor.

PASADENA—The theory is so obscure there’s not a Wikipedia page about it yet. It might be impossible to formulate mathematically. One theoretical physicist calls it the Emperor Palpatine of theories, even more powerful and inscrutable than the Darth Vader theory that he and others have been studying intensively. And yet it has a purity and […]

What the World Looks Like, If You Move Backward in Time [Video]

A remarkable film project.

Oops, I said my last post on the recent Foundational Questions Institute conference would be my final one, but I can’t resist just one more. At the conference, Gavin Crooks at Lawrence Berkeley Labs, who studies molecular machines and gave a great talk on how life balances time asymmetry with thermodynamic efficiency, showed this brilliant short […]

Time on the Brain: How You Are Always Living In the Past, and Other Quirks of Perception

Conscious experience lags 80 milliseconds behind actual events.

COPENHAGEN—I always knew we humans have a rather tenuous grip on the concept of time, but I never realized quite how tenuous it was until a couple of weeks ago, when I attended a conference on the nature of time organized by the Foundational Questions Institute. This meeting, even more than FQXi’s previous efforts, was […]

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