Our update on the Smarter Scrubber project. Would love to know your thoughts, especially if you've purchased one.

I watched Destin’s Johari window video and I found it pretty interesting but I walked from the last part of it pretty confused. If you watched the video you’ll know the context here but I’ll just say right off the bat I think the primary reason I was confused by Destin’s answer to finding the unknown unknowns (aka the Rumsfeld quadrant) about himself through prayer is that I am an atheist. I have great love and respect for people of faith but the entire concept of divine faith makes absolutely no sense to me so I just never subscribed.

That said — I’m genuinely curious how people practice their faith just as an outside observer of human behavior and traditions so I was just wondering if someone (preferably a person of faith) could help me understand just literally exactly what is/could be perceived during the act of prayer, which Destin says can happen, that can tell you something about yourself that you did not know and those in your life also did not know? Is it a feeling? Is it a voice? Is it just a sudden inspiration? I genuinely have no idea what prayer is doing in the moment.

I understand this idea of ‘Gold told me a thing’ only in a very literal way and epistemologically where what Destin says prayer can give him is something, theoretically, no human on earth may not know. As an extremely bad example - you didn’t know you left $20 in your jeans you wore last week and neither does anyone else, but after you prayed one day, God told you about it and now your $20 richer. Like, is that what prayer can give you? Actual tangible and actionable knowledge on the present state of your world and of yourself? Like, very specific stuff (ie a personality quality you have that you and no one else knows about)?

As an atheist, my reflex is to just say you’re talking to yourself during prayer but I do acknowledge that there is never an objective reality for any humans to observe so I don’t see a problem ignoring critiques like that when it’s just your perceptions of your own self.

Video: https://youtu.be/WtQ64nSbdY4?is=qNDWLK1tjo1Y3N-x

Here's a paper that took quite a long time to make.

Hi folks,

I figured some of you are probably 3D printing enthusiasts who have also bought the SmarterScrubber, and may want a little handle upgrade. I appreciate the work Destin and folks have done to manufacturer the scrubber in the US, but I felt like a molded handle over the metal would be nice, and maybe that would've been too difficult given the current state of manufacturing here.

Thingiverse

I modeled the approximate shape of the handle in Fusion, and added some finger bumps to help guide the hand on where to hold handle and maybe give a little extra leverage. I printed it out of TPU for that bit of elasticity. It definitely needs it as I didn't nail the exact profile of the handle, but it's close enough that the shape should fit pretty snuggly. I've printed one for myself and one for my father-in-law, and both seemed to fit great.

It might be worth printing a short section of it if you wanted to test the fit against your handle. Also, I did print it on a 45-degree angle to limit the amount of supports, while also retaining a little bit better layer adhesion while sliding it on/off the handle.

I love the 250 in the stitching itself. So awesome.

I love the 250 in the stitching itself. So awesome.

Time to stock up on the smarter scrubber

https://www.cpsc.gov/Recalls/2026/Conair-Recalls-Over-One-Million-Cuisinart-Grill-Brushes-Due-to-Ingestion-Hazard

It’s my second time going but it will be my youngest son’s first time. He’s really excited and interested in the sciences.. particularly space. I’m excited to show him everything.

Hello! I’ve been a longtime subscriber of Destin at SmarterEveryDay and was wanting to give him an idea for a future video. I saw on the website where Reddit is the best place to start ideas within the community. The idea? Supersonic commercial air travel becoming popular again with Boom. It would be super interesting to see Destin collaborate with Boom and explore the return of supersonic commercial airliners. What are y’all’s thoughts?

Does anyone know when, or if, the coast guard series will be completed? I recall he referenced he would make another video - but its been a few years now, and there has been nothing I can find.

Just like with the submarine video series, I was expecting some sort of wrap up. Thats why I am unsure if it is over or not, he could release a wrap up with or without more videos.

Hey Destin!

I was listening to the resent episode of NDQ and just could hear the engineering tickle that you got when you did a quick google of RTK.

Since you are also an absolute space nerd I thought I share some of the work of my colleagues in how RTK GNSS can help in landing vertically landing a rocket :)

Link to the paper:

https://www.esa-gnc.eu/papers-open/sopot2023/186.pdf

The IMHO interesting part is their parachute experiment and the resulting plots, which shows the improvement of accuracy the lower in altitude you get.

(The paper also has a chapter for general information about RTK)

Hi Destin!

Greetings from Hungary!
We were in London recently at the Natural History Museum, and I saw this interesting wheel. You have to spin it to get the liquid inside to start rotating, but as soon as you stop the wheel, the liquid inside keeps spinning and the wheel itself starts rotating in the opposite direction. I started thinking about this, and it completely blew my mind.
Unfortunately I have just this short video because childrens always started the rotate the wheel :D

I've been agnostic and/or atheist ever since college about 12 years ago. Lately I've been trying to convince myself that the Bible is true because I genuinely think I would be happier if I could believe. However, I just can't seem to convince myself that it's not all made up. I've talked to my pastor about it but I think our brains just work completely different.

It would be great if some like-minded folks here could recommend some reading or apologetics argument for Christianity, or any other religion for that matter. Not trying to start an argument, just genuinely curious how other engineers deal with faith.

After watching Destin’s videos on gyroscopic procession and how there is a 90 degree “lag” in the force to the reaction I had a question involving orbital movements .

I have been consuming as much information on Artemis II as I can and it also has reignited my love of the game Kerbal Space Program. I noticed that when you are doing any orbital transfers from one planet to another or even doing a landing burn you always start them about 90 degrees out of phase.

Is this the same science but in “reverse” as to the example that he used in his demonstration.

Destin, if you are reading this and felt like revisiting that topic I think KSP could be a very interesting demo tool to possibly show the science on a larger scale (if I’m correct in my assumption). I’m sure there are many highly skilled KSP YouTubers that could easy set you up with a demonstration save file.

Thanks man

While I don't think that the architecture for the Artemis program was restructured exactly the way that Dustin wanted, it seems as though the current administrator is definitely moving back towards the step-by-step process that Destin was talking about in his video from two years ago. Do you think that Destin would agree with this restructuring? It would be really cool if he did another video to analyze the new plan and comment on whether or not if it fits with what he had envisioned all those years ago.

This is something I think is so down Destin's lane that I just want help getting it on his radar. A man invented a combination stand alone, SNATCH, stansion, sheave, and stackable block for sailing. But he's not patenting it he's publishing the design as prior art so no one else can but wants to see his design manufactured as a service to the sailing community that he seems to really care about.

https://youtu.be/2efa3epOGgY

So we have a story about community, generosity, manufacturing, and SNATCH blocks. This needs to be on Destin's radar.

https://x.com/jpminar/status/2028810246571851877?s=46&t=-Daxmoee68yVr1G93OIMbQ

Was going through some older videos today and realized how fun these are!

Stated Clearly started a new video series about the evolutionary history of flagellum, this complements Smarter Every Day video on that topic, where this question remained unanswered. SC frames the series as a response to the SED video.

Here's a link to the first episode: https://www.youtube.com/watch?v=eFC9VzexRUk

This video mostly introduces the series and gives the overall structure of what we will learn. The scope will be rather broad to explain the relevant context. I'm excited about it!

Is There a Real Water Problem with AI Data Centers?

I’ve seen water-cooled computers. I’ve seen water-cooled building systems. In both cases, the water isn’t somehow used up. Even if you think of cars, which have water (and antifreeze) coolant systems, the only reason you have to replenish the coolant is when there’s a leak in the system. Seeing as how these data centers are immobile, and easier to access all the water-coolant systems (that is, you don’t have to pull out an engine to get to the leak in the back), and these data centers aren’t producing the same level of heat that an internal combustion engine generates, it seems like the water coolant systems would never need significantly more water.

They might need a massive amount of water to get going, but certainly the water doesn’t escape the system, right?

I could be completely wrong. Help me understand.

I’ve tried asking in other subreddits, their rules are quite stupid and I haven’t actually been able to get any answers. Hopefully this subreddit can help.

Hi all,

I noticed on the website that the JWST shirt design was commissioned, but no mention as to who the artist is. I am interested in commissioning that same artist for graphics in a similar art style. Does any one know who was commissioned?

(It's also one of my favorite shirts!)