Where does “Himalayan salt” come from? A photo thread. Enroute to Islamabad, Pakistan, I stopped to visit the mines in the Khewra salt range; the second largest salt mine in the world. It was discovered when Alexander the Great came through this region in ~330 BC. (1/x)
At that time, salt was highly valued and was even used as currency by the Phoenicians. Interestingly, Alexander’s favorite warhorse, Bucephalus, is buried a few miles from here. (2/x)
This salt mine served the Mughal Empire, and of course the British operated it during their period of colonial rule. It has been actively mined with relatively modern methods since the 1870s. (3/x)
Around 350,000 tons of salt is mined annually, but the reserve estimates are between 82-600 million tons. (4/x)
All the pink Himalayan salt and salt lamps available in Europe and the US come from this mine. They sometimes sport labels suggesting they were made in some other place, but those are re-export labels. They originate here. (5/x)
There is also a medical facility on one level of the mine where Asthma patients are treated without any medication. The air in the mine serves as a natural treatment. (6/x)
The tourist part of the mine has several attractions made entirely of salt. For example, a salt mosque, and a salt replica of the “Minar-e-Pakistan” landmark. (7/x)
A tram carries visitors who would rather not walk the ~ 1km distance through the mine’s entry shaft. (8/x)
Since this is an active, working mine, there are many passage ways that lead away from the tourist areas to where the mining is currently under way. (9/x)
Mining has been done on a room and pillar model, where a “room” is excavated and a pillar around the same width as the room is left standing next to it. Most of these rooms are more than 40 feet deep and filled with water. (10/x)
The water mixed with salt is like that of the Dead Sea… it prevents anyone from drowning. There are dozens of these massive pools all over the mine. The deepest is over 80 ft deep. (11/x)
There are many surreal views and vantage points spread across the mine… beautiful reflecting pools… magical arches… stalactites overhead… (12/x)
This is a part of the mine called The Crystal Palace, so named because it has particularly fine crystals embedded in the walls; they are reflective and quite beautiful to see. (13/x)
This rather interesting air vent also brings water into the mine. Our guide turned the pump on and water came gushing down… (14/x)
This was an incredibly magical trip. A sense of tranquility envelops you when you are inside the mine. You are instantly connected with Alexander and the Mughals; a deep history going back at least 2,400 years. What a remarkable place, indeed! (15/15)
Wow! Thank you for all the interest. Here is a bonus picture of a salt lamp found at one of the souvenir shops just outside the mine.
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What happened to UX evolution? This is the @Xerox STAR, an evolution of the Alto, released 40 yrs ago in 1981. Windows, icons, menus, pointer (WIMP), cut/paste, move, drag, resize. It’s all there, just as in #Windows11. Did we merely change icons & aesthetics for 40 yrs? (1)
UX evolution seems a great example of a search for something better getting stuck in a “local minima”; GUIs are great, but is this paradigm “optimal”? What is the text->GUI-like shift that comes next? Some say VR. But that’s not precise enough. Not universal enough. (2)
There will likely always be a need to see information, unaided, on a 2D surface. Aside from VR, there are speech or voice based interfaces (VUIs) like the popular Alexa, Siri agents. But these are clunky and nowhere close to a general-purpose computing user interface. (3)
I am a huge believer in the Unix philosophy. Small, composable modules, loosely coupled. If you know your way around a Un*x system, you need little else. Here’s an example. I’ve got an NFS volume on a server and I wanted to backup (1)
all the content to USB drives automatically, every hour. I decided to use the rsync program to do differential backups, but ran into an issue. My server is on a UPS, but the USB enclosure is not. So at times, after a power failure, the USB drives aren’t available and rsync (2)
tries to back everything to the /media folder by creating a new local folder instead of writing to the mounted USB drive. I figured I’d resolve this by checking that both my USB drives were mounted before I ran the rsync backup command. Here’s one solution: (3)
I’m bullish on Bitcoin but my reasons are very different from what you might have heard elsewhere. My conviction has to do with what I’ve learned as a student of technology history and my discovery of a class of “resonant ideas” that are eventually guaranteed to succeed. (1)
You see, there are certain persistent desires & dreams we humans have; things we need technology to do for us. And we don’t give up until we get them, even across generations. Why? Perhaps, as a species we have some deep seated urges we can only achieve through technology? (2)
Some of these desires appear in legends or stories from millennia ago. Some, in more recent science fiction. They are then seeded in the consciousness of practitioners and engineers of every generation until the science and technology that can realize them, comes to be. (3)
A couple of weeks ago, I started reading @stephen_wolfram's new book, "A Project to Find the Fundamental Theory of Physics". I have enjoyed it. But, my enjoyment of the book has nothing at all to do (1/6)
with whether or not it indeed points us to a fundamental (or any) theory of physics*. Instead, the pleasure I derived comes from seeing visual manifestations of the ideas of emergence; complexity from simplicity, the power of computation and of generative construction ... (2/6)
that are captured in beautiful pictures throughout the volume.
Rather than simply read, I wanted to experiment with the ideas in the book. The examples, as in all Wolfram writings, were created with Mathematica. (3/6)