Theories of Dark Matter

I used matlab for the simulations I did for my master thesis. I had a for-loop iterating over the variable i. In the loop I called a function which used i as an internal variable. matlab has dynamical scope. The loop never looped, cause the function left i above the break-condition. Don't use matlab unless you have to.

Let me guess, the Mond guy was blanky mcblank, right?

Finally joining the community. Just finished and enjoyed the first video. Cheers

Fortran! LET'S GO!

Here is a podcast about the dark matter experiment I referenced earlier: https://www.theglobeandmail.com/podcasts/the-decibel/article-the-hunt-for-dark-matter-two-kilometres-under-sudbury/

I got it! (The dark matter bars part, at least). Thank you so much for the explanation, Dr. Collier. I'm not at the membership level to contribute my vote to a poll on subjects for future videos, but I hope that "young kids in college-level physics" is an option.: I'd be particularly interested in your opinion. Thanks very much for all your work!

This article is paywalled, but it has some very good photographs and videos of a dark matter experiment happening underground near Sudbury. https://www.theglobeandmail.com/canada/article-the-new-hunt-for-dark-matter/

As a programmer the bit at the end about the languages you use was interesting, it might be a little niche but it could be fun to hear more about what software development is like in the sciences sometimes

I very much appreciate the way you approach science communication. So many content creators fall in to the trap of making videos about overblown implications of theories, observations or "discoveries." You became my favourite youtube content creator with your "dark matter is not a theory" video and I'm thrilled to see a followup.

I really enjoyed this, thanks. The part about stellar bars with leading arms being evidence in favor of dark matter (specifically as a particle, if I understood it properly) was especially interesting. Your research seems really cool, do you still actively research? I think you mentioned something a video about being in industry, now.

Angela! My name is Sophie and I have come up with a workable model for dark matter and would like to talk about it with you. Specifically I believe dark matter makes up everything:) I have a whole powerpoint! -cheers, sophie

Can the next video be on the least important material in science? I bet I’ll understand that.

MATLAB made me cry in my ML module, it truly is the smelliest programming language

Hi Angela, Fortran was my first programming language and I was always a bit annoyed I had to learn others. I would be interested to see a Return of the King video especially if it is about the book rather than the movie. Keeping on making these and I promise I won't mention them to any MOND advocates.

I found your channel, like... maybe a week ago and now I've run out of videos so I'm here. Make what you want to make. Follow your heart. I'll definitely watch it.

Your video on the virial theorem is pure gold! Oh, and as soon as I see an exploding star, that "explainer" is dead to me.

Of course people don't read or listen and just react based on their own beliefs already! I'm sorry they got you down. Don't listen to the youtube people. I think your channel and content is fabulous and happy to support a little bit. All the very best.

Hi Angela, this 54-years old dutch layman wishes you all the best for your new Patreon site. For my daily portion of space and sciences news I rely on wonderful person Anton Petrov. Since a month (via NdG's Startalk) I'm hooked on your channel. I like your in-depth video's. Firstly your voice and facial expressions: sincere, calm and the lights in your eyes tells me you care a lot about the subject you chose. Secondly, I like your way to present the subject. There so much info in your vids they usually take me 50% more time: I pause to read the graph or texts (being dutch I can't read that quickly) and sometimes pause to wikipedia/google names or theories. You trigger my curiosity, thanks for that.

as a programmer a fortran intro video or something would be fun.

Instead of your future Return of the King video getting fewer views, what if it becomes your most viewed video. The algorithm then starts routing other people that watch RotK videos to your other videos. And then, for years, other people are confused why there was a sudden spike in interest in physics among Tolkien fans.

Dark Matter 2: 2 Dark 2 Matter

Amazing video... as someone who does computational simulation of condensed matter systems on occasion I wonder how I might get into the dark matter as a superfluid game... also wondering if we can use other programmable consensed matter systems to simulate it.

Agony! Agony!

Yay Dark Matter! I love that you upload a dark matter video hours after PBS Spacetime does a dark matter and half a week later, upload an entropy video hours after Veritasium does an entropy video. What science channel are you gonna get sniped by next?

I thought Fortran was just a myth

Amazing video you really sparked my interest in science again as a former "pick up a science-book in an airport"-person! Don't have a lot to add other than that i'll be wishing for that star-trajectory-paper. =^)

Great video! As a software engineer interested in simulations and computational things, I'd love to see a video on how simulations are made. I'm a Julia (programming language) fanboy, though. 😀

The OG presentation referenced is at https://www.youtube.com/watch?v=8rok8E_tz8k . Your presentiation is great (as expected), if afflicted by Zoom bitrate. It contains the phrase "The dark bars are thick boys" (internet spelling not included).

there has to be a better way to make videos patreon exclusive right? right?

Regarding the community tab, I have no clue how to add it, but a Patreon-only Discord server would be neat. #GeniusHackerMIT

"Dark matter: Do we need it? What is it? Where is it? How much? What is it? What is it? What is it? What is it?" — I can't get this over my head................

Thanks for this talk! I think you're really nailing it with these videos. Super interested to see your take on numerical recipes. And Return of the King. And water. And whatever else interests you. You seem to have whatever it is that it takes to turn anything into a really compelling story.

Please post your Return of the King video! I always assumed MATLAB was more of an engineering thing. In the sense that obviously it's potentially useful for anything that does a lot of matrix math ("potentially" doing a lot of heavy lifting there) but that it's mostly used in practice by engineering departments.

would be super interested if you could go over the nanograv findings I tried to read the paper but it's all way over my head

It was pretty funny how the next video I watched after this was PBS SpaceTime about Superfluid Axionic Dark Matter: https://www.youtube.com/watch?v=sWNTsKX5H5M And I am looking forward to your video about Return of the King!

Apologies for a long comment, but it's exciting to talk about my own field. Please feel free to ignore. I hope my comment on the other Dark Matter video isn't one of those that bothered you - I've just never heard anyone use "Dark Matter" to include theories of modified gravity before. Maybe this is a physicists vs. astronomers thing, but when physicists say "Dark Matter" they tend to mean, well, some kind of matter. At the risk of pulling a reverse Gell-Mann, one small correction about direct detection - you can't in practice build a detector that's shielded from neutrinos (even, for instance, at the lab 6800 ft. underground where I used to work, there's no appreciable decrease in the neutrino flux). To date, it's largely been possible to ignore those neutrinos because the kinematics are very different from what you expect from WIMPs. However, as we probe to lower and lower WIMP cross sections, we're getting close to what's called the neutrino floor - the point where the background from coherent elastic scattering of neutrinos becomes the same scale as the potential WIMP signal. While I agree that nonsense like "oh, it's the shadow of a multiverse that we can't see" is, well, nonsense, I also think it's worth noting that there's nothing that guarantees that whatever the Dark Matter is has to interact via the weak force - which is what all of our attempts to detect it presuppose. It could be some particle that only interacts gravitationally, which would probably mean that we could never detect it in practice. Very interesting to see your work on galactic bars! I've been seeing that fork diagram of galactic morphology all my life but never really understood how bars form. Again, sorry to be so verbose! I will warn you, however, that any videos on Tolkien will probably elicit equally verbose comments from me. Seriously, though, this is the first Patreon I've supported. I think science communication is really important, and I think you're doing a great job at it.

Angela, you rock! I just love the idea of a patreon funded research paper: I am here for your other content, and I will stick around, but I do think it is a really cool idea. I also think Fortran content would be just awesome: So great to see numerical recipes again after all those years (I spent a long time during my PhD with that book). I think it is so fascinating how layers of complexity emerge in big science software projects and how legacy code is intrinsically interwoven into their fabric. (Just BLAS/LAPACK alone...)

Speaking on LoTR, can Dark Matter be explained by that time that the Valar crossed Belegaer at the end of the War of Wrath and threw Morgoth off the planet and into the Void so now we have a big demon dude floating around outside of both time and space? I think I need a team of scientists to look into this theory. After we work through that theory we can then move on to simulating how the universe would look if some stars were actually elves floating around carrying a Silmaril.

For "off topic" content, channels like Technology Connections seem to like to have what they call second channels, in that particular case it's called Technology Connextras. Perhaps consider that if there's a concern about channel effects.

I loved the video - I think of what makes you such an effective teacher is the level of intimacy you have with your audience. It was really nice to see some of your stronger opinions on full display- I’d encourage you to develop that more fully in public videos. For example: being candid about your opinion about MOND. Two video requests: 1) Computer Simulations: Why do we need them? (Remix of the dark matter song required. Tell us about the epistemology, what can they tell us about the universe, what are their limitations, etc.) 2) Fortran: A beautiful language (you called it smooth, I must know more. Maybe do the basics of the language and talk about the aesthetics) I’m really impressed. An excellent debut to Patreon!

I would love to hear what you have to say about Sabine Hossenfelder. When her channel started I enjoyed it, but lately it seems more clickbaity, and I feel like I am missing something there.

Excellent video! If anyone is interested in reading the paper (I was) it's easy to find: just go to Google Scholar and type in the title. The paper is quite understandable and succinct, which is the best kind of paper :-) Congrats!

Oh and you HAVE to learn to avoid the comment trolls. Its no secret that YT comment sections are the worst corners of the internet.

Loved the video, have many opinions about return of the king

I personally would love a LOTR video! Thanks for the video it was great.

Until your videos, dark matter was my string theory - the mystery I was told for decades was going to be REALLY BIG. But they never found anything. And I always thought, it's just going to be some new neutrino anyway. Like, yay we found yet another new particle, and this one has no interactions with anything, great :| Now I'm like, hmm mass vs radiation dominated eras? the CMB? galaxy growth? clusters, maybe SMBH growth? Is anyone looking into this? We got to get on this! You tell a good story.

This video serendipitously dove-tails really well with today's spacetime episode.

googled "galaxy bar" to help in your research. best result was wikipedia explaining how its made of chocolate and air bubbles. took me less than five minutes.

You had me at Fortran.

I was able to follow the video with my one baby’s first astrophysics class in college (which I wandered into as a CS major 🙂) I did have an energetic reaction to Numerical Recipes in … Fortran?! Harrumph! 😉

Hooray, wonderful!

Dark Sector was clearly designed to win hearts and minds

Should have finished the video before commenting. "Sir! This is a Wendys." really made me lose my shit. Sides entering orbit as I'm writing. Maybe I am easy to entertain but that got me.

This comment section. Oh my. Maybe you should lock them down as well? Anyway, thanks for the video!

Fuck mond

Thanks for the video! You mentioned at the end that you work with Fortran and Python. That would be interesting to watch more about that. Dr. Rebecca Smethurst has a video on her youtube channel, "5 ways I use code as an astrophysicist", that talks about programming in science

Thanks for the video, as always it was fun and intesting! Also, feel free to talk about Return of the King and other books. We all like books (right?) and fantasy in particular seems popular with people who have an interest in exact sciences so it's hardly a stretch.

What are doing currently?

I've been downloading some of your videos for my son to watch on our Plex server, since he doesn't have access to YouTube. He wants to be an astronomer/astrophysicist someday. Here's the icon I made for your playlist: https://drive.google.com/file/d/1lXzOJzaFCPV9bUKy5L6jAuEzkp8UJH7j/view Feel free to use it if you want!

Neat

Your dark matter video (now both of them) and your Fluoride video are my favourites. Mond people give me string theory/crackpot vibes whereas the dark zone portal people just sound like stoners. Looking forward to RotK, even though I've not read it.

RETURN! OfThe! KING! RETURN! OfThe! KING!

So excited!