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Sydney Institute for Astronomy
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![Black Holes, White Holes & Other Universes](https://i.ytimg.com/vi/6akmv1bsz1M/maxresdefault.jpg)
Black Holes, White Holes & Other Universes
A new video from Veritasium exploring our understanding of black holes, with a bit of me in there.
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![What did James Webb see at the beginning of time?](https://i.ytimg.com/vi/2pux7v9qJ58/maxresdefault.jpg)
What did James Webb see at the beginning of time?
A new video for The History of the Universe
The Infinities of the Universe
I wrote a short essay on the Infinities of the Universe. You can read it here
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![Back to the trickiest problem....](https://i.ytimg.com/vi/cW27QJYNXtU/maxresdefault.jpg)
Back to the trickiest problem....
Have you ever noticed when Hollywood seems to produce two similar movies at the same time? Armageddon and Deep Impact. Mission to Mars...
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![But did time really run more slowly?](https://i.ytimg.com/vi/3prF2V_a2gY/maxresdefault.jpg)
But did time really run more slowly?
Recently, there was a little media buzz about one of my papers. With Brendon Brewer at the University of Auckland, I identified the time...
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![The Trickiest Problem in Probability](https://i.ytimg.com/vi/XeSu9fBJ2sI/maxresdefault.jpg)
The Trickiest Problem in Probability
Our old friend Veritasium posted this probability problem a while ago on what is apparently the trickiest problem of them all. In the...
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![TRUE Limits of Humanity](https://i.ytimg.com/vi/uzkD5SeuwzM/maxresdefault.jpg)
TRUE Limits of Humanity
I don't have to tell you that there are good and bad science channels on youtube. Kurzgesagt is one of my favourites, always informative...
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![Discovery of the Dulais Stream](https://static.wixstatic.com/media/4c8c3d_5c511e6bd1034a2fa64332fffa32aee9~mv2.jpeg/v1/fill/w_454,h_341,fp_0.50_0.50,q_90,enc_auto/4c8c3d_5c511e6bd1034a2fa64332fffa32aee9~mv2.webp)
Discovery of the Dulais Stream
Late in 2022 (seems like so long ago) I discovered a new stream of stars in the Andromeda Galaxy. This structure, which we detect in the...
![](https://i.ytimg.com/vi/bAedYtUredI/maxresdefault.jpg)
![How Does Light Actually Work?](https://i.ytimg.com/vi/bAedYtUredI/maxresdefault.jpg)
How Does Light Actually Work?
Oh my - I've realised that I have neglected this blog. This year has zipped along at high speed, and we are already into the second half....
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![Pollock Memorial Lecture](https://i.ytimg.com/vi/2rSMvR0OxtQ/sddefault.jpg)
Pollock Memorial Lecture
My recent Pollock Memorial Lecture - "Most of our universe is missing! Adventures in the dark side of the cosmos" is now available on...
![](https://i.ytimg.com/vi/xJGaqe5t14g/maxresdefault.jpg)
![The Hidden Rules of the Universe](https://i.ytimg.com/vi/xJGaqe5t14g/maxresdefault.jpg)
The Hidden Rules of the Universe
I scripted a new video for The Entire History of the Universe on the importance of symmetry in our understanding of the universe.
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![Where did the universe come from?](https://i.ytimg.com/vi/ep5fVxS82FA/maxresdefault.jpg)
Where did the universe come from?
I chatted with Reason with Science about all kinds of things cosmological!
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![Why Fine-Tuning is Real](https://i.ytimg.com/vi/LLonbK0o3qc/maxresdefault.jpg)
Why Fine-Tuning is Real
I spoke with Adherent Apologetics about fine-tuning.
![](https://i.ytimg.com/vi/hcQRN1_sAos/maxresdefault.jpg)
![Einstein Lecture 2022](https://i.ytimg.com/vi/hcQRN1_sAos/maxresdefault.jpg)
Einstein Lecture 2022
Sorry for the break - teaching etc - but a few things have happened. With Tara Murphy, I gave the 2022 Einstein Lecture on gravitational...
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![Just what are space and time?](https://i.ytimg.com/vi/yPVQtvbiS4Y/hqdefault.jpg)
Just what are space and time?
A new video I scripted for The History of the Universe
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![Seeing Red: Was Arp kicked out of astronomy?](https://i.ytimg.com/vi/Smb6lHwgrh0/maxresdefault.jpg)
Seeing Red: Was Arp kicked out of astronomy?
A new episode of Alas Lewis and Barnes, exploring scientific controversies!
![](https://i.ytimg.com/vi/6etTERFUlUI/maxresdefault.jpg)
![The Hunt for Dark Matter](https://i.ytimg.com/vi/6etTERFUlUI/maxresdefault.jpg)
The Hunt for Dark Matter
I was interviewed by Veritasium (Derek Muller) in his recent video on his hunt for dark matter. Check out the video here:
![](https://i.ytimg.com/vi/iyhFjvApvm0/hqdefault.jpg)
![The Physics & Philosophy of Fine-Tuning](https://i.ytimg.com/vi/iyhFjvApvm0/hqdefault.jpg)
The Physics & Philosophy of Fine-Tuning
A two-hour discussion of one of the deep questions of the universe.
![The quantum of cosmos future](https://static.wixstatic.com/media/4c8c3d_83094d9ed84f44d4a2ea1bf2e1d92505~mv2.png/v1/fill/w_454,h_341,fp_0.50_0.50,q_95,enc_auto/4c8c3d_83094d9ed84f44d4a2ea1bf2e1d92505~mv2.webp)
The quantum of cosmos future
A new discussion on the Quantum of Cosmos Future over at Arts Wednesday. Just what will tomorrow bring? Let's use physics to find out!
![](https://i.ytimg.com/vi/1jmNzlTd09E/hqdefault.jpg)
![How many multiverses are there?](https://i.ytimg.com/vi/1jmNzlTd09E/hqdefault.jpg)
How many multiverses are there?
In a new video by the History of the Universe, I explore the possible multiverses that might be out there!
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