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Uploaded 11-02-20

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What does the strong nuclear force, the fundamental symmetries of nature, and a laundry detergent have in common? They’re all important parts of the tale of the axion - a tale whose end may take us beyond the standard model and solve one of the most vexing mysteries in astrophysics.

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The story of the axion is a classic physics tale: intrepid scientists delve deep into trackless mathematics in search of answers to a mystery. And there, against all expectations, they find the hint of a completely new and unexpected denizen of the natural world. In this case the mystery was a subtle inconsistency in the behavior of the fundamental forces. And the unexpected discovery? A brand new particle - the axion - which, while not proven to exist, may explain a much more famous conundrum. The axion may explain dark matter.

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Uploaded 22-04-20

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From Stargate to Interstellar, wormholes are our favorite method for traveling across fictional universes. But they are also a very serious field of study for some of our greatest minds over the last century. So what’s the holdup? When do we get to wormhole ourselves out of here?

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#space #astrophysics #interstellar

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Uploaded 07-09-21

How do you see the unseeable - how do you explore the inescapable? Our cleverest astronomers have figured out ways to catch light that skims the very edge of black holes. Let’s find out what they learned.

A few weeks ago a story made the rounds of pop-sci media proclaiming that for the first time light had been detected from behind a black hole. The reports were about a paper that claimed to have seen X-rays that came not from inside but from the back end black hole. This is obviously cool stuff - I mean, really anything new with black holes captures the public attention. But this result is cool in ways most people aren’t aware. And it brought us closer to a goal that I’ve been personally striving towards for years - trying to understand what happens in the vicinity of the largest black holes in the universe. I thought it would be worth doing a space time journal club on the Nature paper by Wilkins, Gallo, Costantini, Brandt and Blandford so I get to talk about my favorite subject in the universe.

Nature Paper
https://www.nature.com/articles/s41586-021-03667-0

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#space #blackholes #astrophysics

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Uploaded 14-11-18

With the large hadron collider running out of places to look for clues to a deeper theory of physics, we need a bigger particle accelerator. We have one - the galaxy.

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Physics is currently in a weird place. Historically, no matter how crazy our theories got, there were always new ways to test them. Your theory predicts a new particle? Build a particle accelerator big enough to see it. But once your collider spans entire countries – like the Large Hadron Collider in Switzerland – there’s only so much larger you can go - at least on the surface of the Earth. The LHC has thoroughly tested the standard model of particle physics. The last component of that model – the Higgs boson – was verified in 2013. But the standard model isn’t the end of the story – there MUST be a more fundamental theory that explains the origins of this rich family of particles. Proposals for such grand unified theories proliferate, unconstrained by even the tiniest hint of new physics from the LHC.

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Previous Episode:
Why String Theory is Right | Space Time
https://www.youtube.com/watch?v=iTTa9YcTe1k

Hosted by Matt O'Dowd
Written by Matt O'Dowd
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سلطان الخليفي

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