Back when replaceable batteries were the norm, I had two Blackberries that survived going through the washer and dryer.

Agree about the watch - I wear a Casio LCW-M100TSE, which is also very robust (titanium case, saphire glass), never needs the battery changing and never needs setting (except for travel). But most importantly, it does what it does really well and never bugs me about anything. Downtime is important.

It seems like trucks are a use case where battery swapping would make a lot of sense. Unlike with cars, the battery doesn't need to be a structural element, and there's much less need for it to be a strange shape, as in some cars.

I don't see her later on in the news article - just in the video. Did Apple remove the picture after you pointed it out?

The still photo (with 富士康科技 photoshopped out) is the second image of the "In Houston, workers assemble advanced AI servers" photo carousel https://www.apple.com/newsroom/images/2026/02/apple-accelera...

Neutrino mass is another anomaly, which is at least slightly easier to probe than quantum gravity: https://cerncourier.com/a/the-neutrino-mass-puzzle/

One interesting gap in the standard model is why neutrinos have mass: https://cerncourier.com/a/the-neutrino-mass-puzzle/

I'm British, but when submitting papers for blind review, always use American spelling for obvious reasons. I suppose I could change it after acceptance, but that would just be pretentious.

I've used bubblesort when simulating LEO satellite constellations, calculating which satellite is closest to a location. I used one single backwards pass of bubblesort, so O(n) every k timesteps to bring the closest to the head of the array, then every timestep just do one backwards bubblesort pass over the first few in the array. Given satellites move smoothly, if you initialize right (a few full passes at the start to get the closest few at the front) and get the constants right so a satellite outside the front few in the array can't have moved far enough to become closest without being promoted to the front few by a periodic full pass, then you always maintain the closest at the front of the array very cheaply. And this has the advantage of also being very simple to code.

And if you do get one somehow, it's really hard to spend. Many places won't accept them.

I use them regularly and have never had anyone not accept them.

I have had many places reject $100 bills though.

I’m that weirdo that tries to pay cash for most everything, so sample size is large and across a diverse set of businesses.

Due to what I tend to pay cash for these days (lunches, drinks with a friend, etc.) and prices being what they are, they are rapidly becoming my “go-to” denomination.

It's definitely possible to break the rules. In fact, to give a truly outstanding talk that everyone remembers, you probably have to break the rules (speaking as someone who coded an entire Sigcomm presentation in a 3d game engine). But most early career researchers, for whom this advice is presumably intended, are not good enough at giving talks for that to be a good idea. In fact most tenured professors aren't too. If you do break the rules, you need to have a very clear idea in your head as to how you're going to pull it off, and a good idea of who your audience is and how they'll perceive it, and those are both hard to achieve without a lot of experience.