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The exact same thing happened to me while I was deplaning, a few years prior to Covid. Full face sneeze with no effort to cover their mouth or nose, at like 1 foot away. So I still wear a mask on planes and in the airport.
The exact same thing happened to me while I was deplaning, a few years prior to Covid. Full face sneeze with no effort to cover their mouth or nose, at like 1 foot away. So I still wear a mask on planes and in the airport.
There absolutely are, but I’m not super familiar with all of the consequences of majorana neutrinos. /u/drail@fedia.io might be able to provide a better answer. My background is experimental nuclear physics, so I’m familiar a lot of experiments searching for beyond the standard model physics, but less so with the theory motivation.
One consequence of neutrinos being their own antiparticles is that it breaks lepton number conservation. This also breaks chiral symmetry, since all neutrinos are right-handed and anti-neutrinos are left-handed. This observation would also imply that neutrinos have mass - which is assumed but would be a really big deal to prove.
Yeah it’s one of those terms that’s unfortunately been co-opted for another definition. Definitely made some of my google searches in grad school feel icky… The physics terminology came first though!
Despite space being “empty” there’s still a surprising amount of stuff streaming through it. There are protons, electrons, carbon nuclei, etc constantly slamming into the Earth’s atmosphere, producing showers of radiation. These cosmic rays are the reason so many sensitive physics experiments ( like dark matter and neutrinoless double beta decay searches) are located deep underground. The earth is a good shield against these cosmic backgrounds.
Even if there was an “isolated” antimatter galaxy, it would get bombarded with matter in the form of cosmic rays. The annihilation photons are a really distinct signal that would be hard to miss. There are a number of gamma ray telescopes in space that map out sources of gammas, and they would have detected an antimatter galaxy if it existed.
If the antimatter galaxies are so far away that they’re beyond the visible universe, then there’s still the big question of why there was a segregation of matter and antimatter early on.
You’re not alone; matter-antimatter asymmetry is one of the big open questions in physics. Most particle processes treat matter and antimatter identically, but there are a few areas where matter and antimatter have slightly different interactions. These occurrences are violations of Charge Parity symmetry aka CP Violation.
There must have been a certain amount of CP violation during the early phases of the Big Bang to explain our matter-dominated universe. But the known amounts of CP Violation are nowhere near enough to explain the asymmetry in matter and antimatter. There are some proposed mechanisms that would violate CP symmetry in sufficient quantities, but these haven’t been experimentally observed. There are ongoing searches to detect these processes, or related processes that would be possible if these existed. Neutrinoless double beta decay searches are one example of these detection efforts.
In summary, there’s a guaranteed Nobel Prize to whoever can answer your question.
No problem! Also your response just reminded me of one key feature that Arctic has that Voyager doesn’t yet: push notifications.
I used to use Memmy before development stopped. I found Voyager had all the features/UI that I wanted and used that for a while. Recently I’ve started trying Arctic - it’s similar to Voyager but has a few UI tweaks I prefer.
Edit: oh and both of these apps support instance blocking
but women (who are human beings)
Is that actually the church’s stance? Like, has the pope ever said this?
As someone who occasionally struggles with insomnia, I highly recommend the Insomnia Coach App for iOS or Android. It’s entirely free (no ads or in-app purchases) and based on Cognitive Behavioral Therapy. It was developed by the US Department of Veterans Affairs, but it’s available and applicable to anyone who has trouble sleeping. It has guided meditation and other tools to help you sleep or identify causes of insomnia.
It requires some effort on your part: you follow a 5 week training plan and keep a sleep diary throughout. However the effort is minimal and again, it’s free. Following the sleep plan significantly improved the number of nights that I have good sleep.
Yeah they had the first functional iOS app long before anyone else (Mlem had started earlier but stalled for a while). I recall some of the Memmy developer’s comments saying they had learned a lot about app development since the first beta and had big plans to overhaul the code base. I’m assuming this turned into too much for them to handle, especially as an unpaid gig.
It’s a shame Memmy’s been abandoned, but I’m still super appreciative of the developer for making a workable Lemmy app back then. It definitely helped ease the sting of the transition from Reddit.
It still is a blurry orange ball, where the orange is the location of radio wave emission. The team did a new image where they measured the polarization of the light, which is the result of strong magnetic fields where the light was emitted. The lines are drawn over the image to depict the polarization orientation of the light as a function of location.
I want to be clear that this is an incredible feat, both the fact that they can produce an image of a black hole from the center of our galaxy AND determine the polarization of the light. But they don’t have a super crisp image of matter swirling into a black hole.
There’s an entire book dedicated to answering your question: The World Without Us.
The Wikipedia article I linked summarizes a lot of the book, but I recommend reading it since the details are fascinating.
TL;DR:
The longest-lasting evidence on Earth of a human presence would be radioactive materials, ceramics, bronze statues, and Mount Rushmore. In space, the Pioneer plaques, the Voyager Golden Record, and radio waves would outlast the Earth itself.
Settle down, Jayden
One definition: food “belonging to the category that is salty or spicy rather than sweet.”
It’s a bit of an odd definition but it gets the gist across. An example of using savory: differentiating between pies with savory filling (meats, vegetables, etc) and sweet filling (fruits, custard).
Idk how a 10 minute drive is a half hour walk. Average walking speed is 3 mph, so a half hour is 1.5 miles. If you’re driving that in 10 minutes, you’re only averaging 9 mph.
I don’t mean to pile on here because I understand your frustration. I grew up in NYC where basically no one drives, and didn’t get a driver’s license until my 30s when I moved to California for work. Even then I put off getting a car for years, since I like walking and don’t mind “decent” public transit.
But it just became impossible to continue. My commute was an hour and 45 minutes (one way), with about 40 minutes of walking, a train and a bus. I like walking but when it was over 100 degrees in the summer, or raining, or a wildfire smoke day it was miserable. The buses run every 30 minutes so if there’s a missed connection the commute becomes over 2 hours (still just one way). And the train has only 1 line so when there’s a mechanical issue you’re out of luck and just have to call an Uber anyway.
I finally broke down and got a car. My commute is now 30 minutes each way. The gas for my commute is somehow cheaper than the public transit. It’s ridiculous and it shouldn’t be this way, but it is.
It’s already been published. But it’s superconducting at 10 K. This is a new high temperature record, but pretty far from room temperature.
They’ve been doing studies of what would be required for ignition for a while, but have never demonstrated ignition using the Z machine.
If they did have ignition, there’s no way they would’ve let LLNL claim to be first and enjoy all the media attention.
Nah, the Z machine never achieved ignition. That doesn’t mean it’s not a really cool facility though!
Link to the NASA study