Nice, thanks!

Because electronics companies and people have been pushing the miniaturization of electronics since they knew how. As a result, we get greater efficiency and power, with a smaller form factor. The trade off is that the R & D could take longer and cost more.

With most tech and electronics though, bigger isn’t always better, because with decreased form factors you can make room for other things, that will increase efficiency and power. You see it now with smartphones which are literally mini pocket computers, amongst other things.

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Lots of ores are not actually found in veins. Massive bodies (like a mound of sulfide having several million tonnes of sulfide minerals in a lens), disseminated ore minerals in huge volumes of rock, and minerals in beds are more common. Some ores are even formed by settling of the ore minerals within mostly-still liquid magma chambers (early-formed minerals act like sediments, in a way). It is only certain types of ores that tend to be found mostly in some sort of vein form.

Mostly, veins are due to the movement (flow) of hot fluids (mostly salty water) through fractures in the rock. The minerals drop out of the fluid and fill the fracture for possible various chemical reasons (change in temp, change in pressure, reaction with the different chemistry of the wall rock). Many massive orebodies, like volcanogenic massive sulfides or sediment-hosted massive sulfides, form when the fractures reach the surface and discharge into a water body (make black smokers, say), so yes, there will be a stockwork of veins beneath the ore but the main ore body is basically a "sedimentary" deposit formed in open water. A good portion of ore mineralization is the result of flowing of hydrothermal fluids, so the underground part will have veins. The vein parts might be pretty poor value though, if the metals only drop out above surface. Lots of quartz and pyrite does not make much of an ore in itself.

Most of the vein-associated ores are ones that have a high dollar value so you don't need a massive amount of the ore to make it an "ore" rather than just an interesting occurrence not worth money to dig it out. Gold is a big one for having a vein-association, and part of this appears to be due to the role of metamorphic dewatering reactions in the formation of certain gold ore types (the fluids never reach surface, and are generated at great depth so the entire mineralization event occurs at substantial depth underground and no massive ores can form). The other part is that chasing veins when they are rich in gold or silver or some metal worth lots of money can be cost effective. No modern mining chases copper or zinc veins like that, unless the entire mountain is filled with lower-grade ore and the huge size makes it worth the effort financially. A dollar per tonne adds up when you deal with millions of tonnes. It does not add up when you are dealing with thousands of tonnes chasing a vein: then you want many dollars per tonne. Remember, t=hat a lot of the cost of mining comes at the start, setting up the very expensive facilities to deal with the ore and make it rich enough to transport cost-effectively.

Sure, early mining did chase veins and very rich zones of mineralization, because the technology for metal recovery was crappy and you needed high grade or the stuff was useless. Mines were created where the ore was clearly visible and very rich. That is often not the case these days. Now, we can recover gold economically even if the stuff is running only a couple-few grams per tonne. The equivalent $$ value of copper though needs a kg per tonne even if you are very efficient at recovery of the metals.

Many mining ventures have re-processed the waste piles from old workings and gotten a lot of that low-grade stuff out, and made money, particularly with respect to high-value metals.

Another side comment is that when a sulfide body deposits on the bottom of the ocean, the water coming from below still keeps coming, and ends up passing through the earlier-deposited sulfides, and lots of fun chemical changes can happen even within the ore body. There will be late veins cutting the earlier massive sulfide, for example.

Everyone already explained that chewing breaks food down into smaller pieces which are easier to digest (which is true). But there's more: the first digestive enzyme that has contact with food is im your saliva. It's called amylase and breaks down carbohydrates into sugars. That's why bread starts to taste sweet if you chew it for a really long time. Also, chewing and swallowing send out signals to your stomach/ bowels so that it can prepare for the arrival of food to digest

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There are a lot of advances which went into that, but the single biggest which made the shift possible was the birth and refinement of the transistor. Before that you had to use vacuum tubes or something similar, which are individually large, require a lot of space too emit heat, and which can only be miniaturized so far. Transistors started off large, but now we fit billions of them on a single chip.

Interesting thank you

Midday is 3pm in parts of China. The country operates a single time zone based on Beijing. So the far western regions don't align with the sun.

>For example being 2:00 pm on USA

Where in USA? It has six timezones.

The answer to your question is another question:

How many people will agree for their solar midday (i.e. sun at the highest in the sky) to be at, say 5pm. Timezones are there for people's convenience. Having to account for time zones is something relatively few people have to consciously do, even today. And if they have to, they will usually use UTC as a reference, because it's the reference standard timezones are arranged around.

Even certain countries adhering to am/pm itself just shows what the obstacle would be. You can't have a 4 post meridiem (AFTER MIDDAY) if midday is several hours away. And trying to get them to simply use a 24h clock is an uphill battle, much less accept a time that doesn't align witg their day.

TL;DR It'll be possible to unify the world's time when you, the OP, will happily agree that your sunrise is at 17:00, your midday is at 23:00 and your midnight is at 11:00. Why those times? Because someone else that isn't you decided that their time aligns with solar time, deal with it.

>Who is still using it daily?

These two for one example....

And you also have Field Day operators

And various CW nets around the bands daily. Here is one example.

Code is alive and well. The guys who are fluent are awesome at it and it is amazing to watch.

Sounds like the internet version of Esperanto.

In the late 90's early 00's there was something called Swatch Internet Time that was a 0-1,000 time scale measured in "beats" that operated under this idea but obviously it never caught on.

>UST

UTC. Maybe GMT. UST isnt a standardized use, and means a bunch of different things. Ulanbaatar standard time seems to be a common one.

Appreciate it

Thanks a lot

Thank you , you made it quite understandable!

I can barely get my head around the fact that the seasons are flipped in the southern hemisphere compared to here in the north! Traveling would be a bit odd. It’s nice to know that I have the reference point of 12 being either in middle of the day or night no matter how far I go. If I fly 10 hours away and land when it’s dark, how would I have a clue how long it was until the sunrise?

There is a standard called UST which every country can reference which will be the same no matter where one is in the world.

It simply isn't very convenient. Most societies have adopted a convention and cultural references that are more amenable to local time standards. (for example things like "9 to 5". etc)

As there is no requirement or law forcing countries or peoples to adopt UST, the choice is really theirs. It might suck that you don't like it but people don't really have to make things easy for you.

Noon is midday. It can't be 2pm somewhere where it isn't 2 hours past midday. You could use the 24h system with UTC everywhere, but that's already done for any systems that need synchronization.

We don't use it in day to day life, because for 99% of people, only one timezone is relevant at a time, and keeping the meaning of different times the same takes precedence.

Also useful is knowing what the average person is doing in a country you're interacting with. If I message my coworkers in Romania (arbitrary country, I have coworkers there) at their midnight, I know I won't get an answer till their morning. If it just says 15:00 or whatever on the clock and there's no timezones, I would have to put in significantly more effort into figuring out if people in Romania are sleeping now.

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It’s easier for the 2pm across the world to be aligned with daytime and 2am to be aligned with nighttime. Otherwise you would have to know the exact geographic location of each place you refer to since 2pm could be morning at one place, afternoon at another and night at another

Also the world completes one full rotation every 24 hrs, with the sun making landfall on one part of the earth before the rest (E.g. sunrise in Japan occurs when it’s sun setting in the western world). Hence it’s easier and more useful to track time around the world by using taking in account the world rotating and sunlight making landfall

At one point it was normal to have no spaces or punctuation between written words.

https://en.wikipedia.org/wiki/Scriptio_continua

It’s interesting to think about spacing and punctuation as a technology.

That is pro-lapsing. You can occasionally see examples of it on certain NSFW sites.

That would be a prolapse... hernia is when an organ (frequently intestines) break through a membrane. Such as your pelvic floor or abdominal wall.