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8 Ancient Writing Systems That Haven't Been Deciphered Yet

The Indus Valley civilization was one of the most advanced in the world for more than 500 years, with more than a thousand settlements sprawling across 250,000 square miles of what is now Pakistan and northwest India from 2600 BCE to 1900 BCE. It had several large, well-planned cities like Mohenjo-daro, common iconography—and a script no one has been able to understand. 

Over at Nature, Andrew Robinson looks at the reasons why the Indus Valley script has been so difficult to crack, and details some recent attempts to decipher it. Since we don't know anything about the underlying language and there's no multilingual Rosetta stone, scholars have analyzed its structure for clues and compared it to other scripts. Most Indologists think it's "logo-syllabic" script like Sumerian cuneiform or Mayan glyphs. But they disagree about whether it was a spoken language or a full writing system; some believe it represented only part of an Indus language, Robinson writes. 

One team has created the first publicly available, electronic corpus of Indus texts. Another, led by computer scientist Rajesh Rao, analyzed the randomness in the script's sequences. Their results indicated it's most similar to Sumerian cuneiform, which suggests it may represent a language. Read the full article for more details.   

The Indus Valley script is far from the only one to remain mysterious. Here are eight others you might try your hand at deciphering.

1. Linear A

In 1893, British archaeologist Sir Arthur Evans purchased some ancient stones with mysterious inscriptions on them at a flea market in Athens. On a later trip to the excavations at Knossos on the island of Crete, he recognized one of the symbols from his stones and began a study of the engraved tablets being uncovered at various sites on the island. He discovered two different systems, which he called Linear A and Linear B. While Linear B was deciphered in the early 1950s (it turned out to represent an early form of Greek), Linear A, above, has still not been deciphered.

2. Cretan Hieroglyphics


The excavations on Crete also revealed a third type of writing system, with symbols that looked more picture-like than those of the linear scripts. Some of these symbols are similar to elements in Linear A. It is assumed that the hieroglyphic script developed into Linear A, though the two systems were both in use during the same time period.

3. Wadi el-Hol script


In the 1990s, a pair of Yale archaeologists discovered a graffiti-covered cliff wall at the Wadi el-Hol (Gulch of Terror) in Egypt. Most of the inscriptions were in systems they could recognize, but one of them was unfamiliar. It looks like an early transition from a hieroglyphic to an alphabetic system, but it hasn't yet been deciphered.

4. Sitovo inscription


In 1928 a group of woodcutters found some markings carved into a Bulgarian cliffside. They thought the marks indicated hidden treasure, but none was found. Word got around and soon some archaeologists had a look. Later, the head of the expedition was executed for being a secret agent for the Soviets in Bulgaria. One piece of evidence used against him was a strange coded message he had sent to Kiev—actually a copy of the cliffside inscription he had sent to colleagues for scholarly input. It is not clear what language the inscription represents. Thracian, Celtic, Sarmato-Alanian, and Slavic are some of the possibilities scholars have argued for. Another suggestion is that it's simply a natural rock formation.

5. Olmec writing

The Olmecs were an ancient Mexican civilization best known for the statues they left behind: the so-called "colossal heads." In 1999, their writing system was revealed when road builders unearthed an inscribed stone tablet. The tablet shows 62 symbols; some look like corn or bugs, and some are more abstract. It has been dated to 900 B.C., which would make it the oldest example of writing in the Western Hemisphere.

6. Singapore stone


There once was a giant engraved slab made of sandstone at the mouth of the Singapore River. It had been there for 700 years or so when, in 1819, workers uncovered it while clearing away jungle trees. A few scholars got a look at it before it was blown to bits in order to make space for a fort to protect the British settlements. The parts that didn’t end up in the river were eventually used for road gravel, though some fragments were saved. The script hasn't been deciphered, but there have been various suggestions for what language it might represent: ancient Ceylonese, Tamil, Kawi, Old Javanese, and Sanskrit.

7. Rongorongo


When missionaries got to Easter Island in the 1860s, they found wooden tablets carved with symbols. They asked the Rapanui natives what the inscriptions meant, and were told that nobody knew anymore, since the Peruvians had killed off all the wise men. The Rapanui used the tablets as firewood or fishing reels, and by the end of the century they were nearly all gone. Rongorongo is written in alternating directions; you read a line from left to right, then turn the tablet 180 degrees and read the next line.

8. Proto-Elamite

Marie-Lan Nguyen via Wikimedia Commons // CC BY 2.5

This ancient writing system was used more than 5000 years ago in what is now Iran. Written from right to left, the script is unlike any other ancient scripts; while the proto-Elamites appear to have borrowed the idea for a written language from their Mesopotamian contemporaries, they apparently invented their own symbols—and didn't bother to keep track of them in an organized way, proto-Elamite expert and Oxford University scholar Jacob Dahl told the BBC in 2012. Around that time, he and his Oxford colleagues asked for help from the public in deciphering proto-Elamite. They released high-quality images of clay tablets covered in Proto-Elamite, hoping that crowdsourcing could decode them. Now a collaboration involving several institutions, the project is ongoing

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iStock // Ekaterina Minaeva
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Man Buys Two Metric Tons of LEGO Bricks; Sorts Them Via Machine Learning
May 21, 2017
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iStock // Ekaterina Minaeva

Jacques Mattheij made a small, but awesome, mistake. He went on eBay one evening and bid on a bunch of bulk LEGO brick auctions, then went to sleep. Upon waking, he discovered that he was the high bidder on many, and was now the proud owner of two tons of LEGO bricks. (This is about 4400 pounds.) He wrote, "[L]esson 1: if you win almost all bids you are bidding too high."

Mattheij had noticed that bulk, unsorted bricks sell for something like €10/kilogram, whereas sets are roughly €40/kg and rare parts go for up to €100/kg. Much of the value of the bricks is in their sorting. If he could reduce the entropy of these bins of unsorted bricks, he could make a tidy profit. While many people do this work by hand, the problem is enormous—just the kind of challenge for a computer. Mattheij writes:

There are 38000+ shapes and there are 100+ possible shades of color (you can roughly tell how old someone is by asking them what lego colors they remember from their youth).

In the following months, Mattheij built a proof-of-concept sorting system using, of course, LEGO. He broke the problem down into a series of sub-problems (including "feeding LEGO reliably from a hopper is surprisingly hard," one of those facts of nature that will stymie even the best system design). After tinkering with the prototype at length, he expanded the system to a surprisingly complex system of conveyer belts (powered by a home treadmill), various pieces of cabinetry, and "copious quantities of crazy glue."

Here's a video showing the current system running at low speed:

The key part of the system was running the bricks past a camera paired with a computer running a neural net-based image classifier. That allows the computer (when sufficiently trained on brick images) to recognize bricks and thus categorize them by color, shape, or other parameters. Remember that as bricks pass by, they can be in any orientation, can be dirty, can even be stuck to other pieces. So having a flexible software system is key to recognizing—in a fraction of a second—what a given brick is, in order to sort it out. When a match is found, a jet of compressed air pops the piece off the conveyer belt and into a waiting bin.

After much experimentation, Mattheij rewrote the software (several times in fact) to accomplish a variety of basic tasks. At its core, the system takes images from a webcam and feeds them to a neural network to do the classification. Of course, the neural net needs to be "trained" by showing it lots of images, and telling it what those images represent. Mattheij's breakthrough was allowing the machine to effectively train itself, with guidance: Running pieces through allows the system to take its own photos, make a guess, and build on that guess. As long as Mattheij corrects the incorrect guesses, he ends up with a decent (and self-reinforcing) corpus of training data. As the machine continues running, it can rack up more training, allowing it to recognize a broad variety of pieces on the fly.

Here's another video, focusing on how the pieces move on conveyer belts (running at slow speed so puny humans can follow). You can also see the air jets in action:

In an email interview, Mattheij told Mental Floss that the system currently sorts LEGO bricks into more than 50 categories. It can also be run in a color-sorting mode to bin the parts across 12 color groups. (Thus at present you'd likely do a two-pass sort on the bricks: once for shape, then a separate pass for color.) He continues to refine the system, with a focus on making its recognition abilities faster. At some point down the line, he plans to make the software portion open source. You're on your own as far as building conveyer belts, bins, and so forth.

Check out Mattheij's writeup in two parts for more information. It starts with an overview of the story, followed up with a deep dive on the software. He's also tweeting about the project (among other things). And if you look around a bit, you'll find bulk LEGO brick auctions online—it's definitely a thing!

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8 Common Dog Behaviors, Decoded
May 25, 2017
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iStock

Dogs are a lot more complicated than we give them credit for. As a result, sometimes things get lost in translation. We’ve yet to invent a dog-to-English translator, but there are certain behaviors you can learn to read in order to better understand what your dog is trying to tell you. The more tuned-in you are to your dog’s emotions, the better you’ll be able to respond—whether that means giving her some space or welcoming a wet, slobbery kiss. 

1. What you’ll see: Your dog is standing with his legs and body relaxed and tail low. His ears are up, but not pointed forward. His mouth is slightly open, he’s panting lightly, and his tongue is loose. His eyes? Soft or maybe slightly squinty from getting his smile on.

What it means: “Hey there, friend!” Your pup is in a calm, relaxed state. He’s open to mingling, which means you can feel comfortable letting friends say hi.

2. What you’ll see: Your dog is standing with her body leaning forward. Her ears are erect and angled forward—or have at least perked up if they’re floppy—and her mouth is closed. Her tail might be sticking out horizontally or sticking straight up and wagging slightly.

What it means: “Hark! Who goes there?!” Something caught your pup’s attention and now she’s on high alert, trying to discern whether or not the person, animal, or situation is a threat. She’ll likely stay on guard until she feels safe or becomes distracted.

3. What you’ll see: Your dog is standing, leaning slightly forward. His body and legs are tense, and his hackles—those hairs along his back and neck—are raised. His tail is stiff and twitching, not swooping playfully. His mouth is open, teeth are exposed, and he may be snarling, snapping, or barking excessively.

What it means: “Don’t mess with me!” This dog is asserting his social dominance and letting others know that he might attack if they don’t defer accordingly. A dog in this stance could be either offensively aggressive or defensively aggressive. If you encounter a dog in this state, play it safe and back away slowly without making eye contact.

4. What you’ll see: As another dog approaches, your dog lies down on his back with his tail tucked in between his legs. His paws are tucked in too, his ears are flat, and he isn’t making direct eye contact with the other dog standing over him.

What it means: “I come in peace!” Your pooch is displaying signs of submission to a more dominant dog, conveying total surrender to avoid physical confrontation. Other, less obvious, signs of submission include ears that are flattened back against the head, an avoidance of eye contact, a tongue flick, and bared teeth. Yup—a dog might bare his teeth while still being submissive, but they’ll likely be clenched together, the lips opened horizontally rather than curled up to show the front canines. A submissive dog will also slink backward or inward rather than forward, which would indicate more aggressive behavior.

5. What you’ll see: Your dog is crouching with her back hunched, tail tucked, and the corner of her mouth pulled back with lips slightly curled. Her shoulders, or hackles, are raised and her ears are flattened. She’s avoiding eye contact.

What it means: “I’m scared, but will fight you if I have to.” This dog’s fight or flight instincts have been activated. It’s best to keep your distance from a dog in this emotional state because she could attack if she feels cornered.

6. What you’ll see: You’re staring at your dog, holding eye contact. Your dog looks away from you, tentatively looks back, then looks away again. After some time, he licks his chops and yawns.

What it means: “I don’t know what’s going on and it’s weirding me out.” Your dog doesn’t know what to make of the situation, but rather than nipping or barking, he’ll stick to behaviors he knows are OK, like yawning, licking his chops, or shaking as if he’s wet. You’ll want to intervene by removing whatever it is causing him discomfort—such as an overly grabby child—and giving him some space to relax.

7. What you’ll see: Your dog has her front paws bent and lowered onto the ground with her rear in the air. Her body is relaxed, loose, and wiggly, and her tail is up and wagging from side to side. She might also let out a high-pitched or impatient bark.

What it means: “What’s the hold up? Let’s play!” This classic stance, known to dog trainers and behaviorists as “the play bow,” is a sign she’s ready to let the good times roll. Get ready for a round of fetch or tug of war, or for a good long outing at the dog park.

8. What you’ll see: You’ve just gotten home from work and your dog rushes over. He can’t stop wiggling his backside, and he may even lower himself into a giant stretch, like he’s doing yoga.

What it means: “OhmygoshImsohappytoseeyou I love you so much you’re my best friend foreverandeverandever!!!!” This one’s easy: Your pup is overjoyed his BFF is back. That big stretch is something dogs don’t pull out for just anyone; they save that for the people they truly love. Show him you feel the same way with a good belly rub and a handful of his favorite treats.

The best way to say “I love you” in dog? A monthly subscription to BarkBox. Your favorite pup will get a package filled with treats, toys, and other good stuff (and in return, you’ll probably get lots of sloppy kisses). Visit BarkBox to learn more.

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