WHAT I LEARNED FROM SPENDING 31 DAYS UNDERWATER

How would it feel like to live in a deep ocean? Fabien Cousteau talks about his underwater adventure in a TED talk.

Practice new expressions like wondrous, hold secret, gauge, predator, prey, in the blink of an eye and describe the ecology of deep ocean to your friendly Cambly tutor.


[TED] Fabien Cousteau: What I learned from spending 31 days underwater

In 1963, Jacques Cousteau lived for 30 days in an underwater laboratory positioned on the floor of the Red Sea, and set a world record in the process. This summer, his grandson Fabien Cousteau broke that record. Cousteau the younger lived for 31 days aboard the Aquarius, an underwater research laboratory nine miles off the coast of Florida. In a charming talk he brings his wondrous adventure to life.

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(P1) I have a confession to make. I am addicted to adventure, and as a young boy, I would rather look outside the window at the birds in the trees and the sky than looking at that two-dimensional chalky blackboard where time stands still and even sometimes dies. My teachers thought there was something wrong with me because I wasn’t paying attention in class. They didn’t find anything specifically wrong with me, other than being slightly dyslexic because I’m a lefty. But they didn’t test for curiosity. Curiosity, to me, is about our connection with the world, with the universe. It’s about seeing what’s around that next coral head or what’s around that next tree, and learning more not only about our environment but about ourselves.

(P2) Now, my dream of dreams, I want to go explore the oceans of Mars, but until we can go there, I think the oceans still hold quite a few secrets. As a matter of fact, if you take our planet as the oasis in space that it is and dissect it into a living space, the ocean represents over 3.4 billion cubic kilometers of volume, within which we’ve explored less than five percent. And I look at this, and I go, well, there are tools to go deeper, longer and further: submarines, ROVs, even Scuba diving. But if we’re going to explore the final frontier on this planet, we need to live there. We need to build a log cabin, if you will, at the bottom of the sea.

(P3) And so there was a great curiosity in my soul when I went to go visit a TED [Prize winner] by the name of Dr. Sylvia Earle. Maybe you’ve heard of her. Two years ago, she was staked out at the last undersea marine laboratory to try and save it, to try and petition for us not to scrap it and bring it back on land. We’ve only had about a dozen or so scientific labs at the bottom of the sea. There’s only one left in the world: it’s nine miles offshore and 65 feet down. It’s called Aquarius. Aquarius, in some fashion, is a dinosaur, an ancient robot chained to the bottom, this Leviathan. In other ways, it’s a legacy. And so with that visit, I realized that my time is short if I wanted to experience what it was like to become an aquanaut.

(P4) When we swam towards this after many moons of torture and two years of preparation, this habitat waiting to invite us was like a new home. And the point of going down to and living at this habitat was not to stay inside. It wasn’t about living at something the size of a school bus. It was about giving us the luxury of time outside to wander, to explore, to understand more about this oceanic final frontier.

(P5) We had megafauna come and visit us. This spotted eagle ray is a fairly common sight in the oceans. But why this is so important, why this picture is up, is because this particular animal brought his friends around, and instead of being the pelagic animals that they were, they started getting curious about us, these new strangers that were moving into the neighborhood, doing things with plankton. We were studying all sorts of animals and critters, and they got closer and closer to us, and because of the luxury of time, these animals, these residents of the coral reef, were starting to get used to us, and these pelagics that normal travel through stopped. This particular animal actually circled for 31 full days during our mission. So mission 31 wasn’t so much about breaking records. It was about that human-ocean connection.

(P6) Because of the luxury of time, we were able to study animals such as sharks and grouper in aggregations that we’ve never seen before. It’s like seeing dogs and cats behaving well together. Even being able to commune with animals that are much larger than us, such as this endangered goliath grouper who only still resides in the Florida Keys. Of course, just like any neighbor, after a while, if they get tired, the goliath grouper barks at us, and this bark is so powerful that it actually stuns its prey before it aspirates it all within a split second. For us, it’s just telling us to go back into the habitat and leave them alone.

(P7) Now, this wasn’t just about adventure. There was actually a serious note to it. We did a lot of science, and again, because of the luxury of time, we were able to do over three years of science in 31 days. In this particular case, we were using a PAM, or, let me just see if I can get this straight, a Pulse Amplitude Modulated Fluorometer. And our scientists from FIU, MIT, and from Northeastern were able to get a gauge for what coral reefs do when we’re not around. The Pulse Amplitude Modulated Fluorometer, or PAM, gauges the fluorescence of corals as it pertains to pollutants in the water as well as climate change-related issues. We used all sorts of other cutting-edge tools, such as this sonde, or what I like to call the sponge proctologist, whereby the sonde itself tests for metabolism rates in what in this particular case is a barrel sponge, or the redwoods of the [ocean]. And this gives us a much better gauge of what’s happening underwater with regard to climate change-related issues, and how the dynamics of that affect us here on land. And finally, we looked at predatorprey behavior. And predator-prey behavior is an interesting thing, because as we take away some of the predators on these coral reefs around the world, the prey, or the forage fish, act very differently. What we realized is not only do they stop taking care of the reef, darting in, grabbing a little bit of algae and going back into their homes, they start spreading out and disappearing from those particular coral reefs. Well, within that 31 days, we were able to generate over 10 scientific papers on each one of these topics.

(P8) But the point of adventure is not only to learn, it’s to be able to share that knowledge with the world, and with that, thanks to a couple of engineers at MIT, we were able to use a prototype camera called the Edgertronic to capture slow-motion video, up to 20,000 frames per second in a little box that’s worth 3,000 dollars. It’s available to every one of us. And that particular camera gives us an insight into what fairly common animals do but we can’t even see it in the blink of an eye. Let me show you a quick video of what this camera does. You can see the silky bubble come out of our hard hats. It gives us an insight into some of the animals that we were sitting right next to for 31 days and never normally would have paid attention to, such as hermit crabs. Now, using a cutting-edge piece of technology that’s not really meant for the oceans is not always easy. We sometimes had to put the camera upside down, cordon it back to the lab, and actually man the trigger from the lab itself. But what this gives us is the foresight to look at and analyze in scientific and engineering terms some of the most amazing behavior that the human eye just can’t pick up, such as this manta shrimp trying to catch its prey, within about .3 seconds. That punch is as strong as a .22 caliber bullet, and if you ever try to catch a bullet in mid-flight with your eye, impossible. But now we can see things such as these Christmas tree worms pulling in and fanning out in a way that the eye just can’t capture, or in this case, a fish throwing up grains of sand. This is an actual sailfin goby, and if you look at it in real time, it actually doesn’t even show its fanning motion because it’s so quick.

(P9) One of the most precious gifts that we had underwater is that we had WiFi, and for 31 days straight we were able to connect with the world in real time from the bottom of the sea and share all of these experiences. Quite literally right there I am Skyping in the classroom with one of the six continents and some of the 70,000 students that we connected every single day to some of these experiences. As a matter of fact, I’m showing a picture that I took with my smartphone from underwater of a goliath grouper laying on the bottom. We had never seen that before.

(P10) And I dream of the day that we have underwater cities, and maybe, just maybe, if we push the boundaries of adventure and knowledge, and we share that knowledge with others out there, we can solve all sorts of problems. My grandfather used to say, “People protect what they love.” My father, “How can people protect what they don’t understand?” And I’ve thought about this my whole life. Nothing is impossible. We need to dream, we need to be creative, and we all need to have an adventure in order to create miracles in the darkest of times. And whether it’s about climate change or eradicating poverty or giving back to future generations what we’ve taken for granted, it’s about adventure. And who knows, maybe there will be underwater cities, and maybe some of you will become the future aquanauts.

(P11) Thank you very much.

WORDS: 1,683

SOURCE: HTTP://WWW.TED.COM/TALKS/FABIEN_COUSTEAU_WHAT_I_LEARNED_FROM_SPENDING_31_DAYS_UNDERWATER

VOCAB: [V022] UNDERWATER_VOCAB

TO PRINT: [V022] UNDERWATER

Discussion Questions

If you found the passage difficult to read or had problems understanding specific words or idiomatic expressions, please discuss them with your tutor. The following discussion questions should be answered in your own words and with your own arguments.

  1. Briefly summarize the speech in your own words.
  2. Why is Cousteau so fascinated by the ocean (P2)?
  3. “And the point of going down to and living at this habitat was not to stay inside. It wasn’t about living at something the size of a school bus. It was about giving us the luxury of time outside to wander, to explore, to understand more about this oceanic final frontier. (P3)” What kinds of things was Cousteau able observe? Explain with details.
  4. Where is Cousteau’s passion and dedication to these underwater adventures coming from (P10)? Do you have something you love so much that you want to dissect into its innermost core?
  5. What are your overall thoughts on Cousteau’s adventure?

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A ROSETTA STONE FOR A LOST LANGUAGE

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 [TED] Rajesh Rao:

A Rosetta Stone for a lost language

Rajesh Rao is fascinated by “the mother of all crossword puzzles”: how to decipher the 4000-year-old Indus script. He’s enlisting modern computation to try to read this lost language, the key to understanding this ancient civilization.

 

 

<Script>

(P1) I’d like to begin with a thought experiment. Imagine that it’s 4,000 years into the future. Civilization as we know it has ceased to exist — no books, no electronic devices, no Facebook or Twitter. All knowledge of the English language and the English alphabet has been lost. Now imagine archeologists digging through the rubble of one of our cities. What might they find? Well perhaps some rectangular pieces of plastic with strange symbols on them. Perhaps some circular pieces of metal. Maybe some cylindrical containers with some symbols on them. And perhaps one archeologist becomes an instant celebrity when she discovers — buried in the hills somewhere in North America — massive versions of these same symbols. Now let’s ask ourselves, what could such artifacts say about us to people 4,000 years into the future?

(P2) This is no hypothetical question. In fact, this is exactly the kind of question we’re faced with when we try to understand the Indus Valley civilization, which existed 4,000 years ago. The Indus civilization was roughly contemporaneous with the much better known Egyptian and the Mesopotamian civilizations, but it was actually much larger than either of these two civilizations. It occupied the area of approximately one million square kilometers, covering what is now Pakistan, Northwestern India and parts of Afghanistan and Iran. Given that it was such a vast civilization, you might expect to find really powerful rulers, kings, and huge monuments glorifying these powerful kings. In fact, what archeologists have found is none of that. They’ve found small objects such as these.

(P3) Here’s an example of one of these objects. Well obviously this is a replica. But who is this person? A king? A god? A priest? Or perhaps an ordinary person like you or me? We don’t know. But the Indus people also left behind artifacts with writing on them. Well no, not pieces of plastic, but stone seals, copper tablets, pottery and, surprisingly, one large sign board, which was found buried near the gate of a city. Now we don’t know if it says Hollywood, or even Bollywood for that matter. In fact, we don’t even know what any of these objects say, and that’s because the Indus script is undeciphered. We don’t know what any of these symbols mean.

(P4) The symbols are most commonly found on seals. So you see up there one such object. It’s the square object with the unicorn-like animal on it. Now that’s a magnificent piece of art. So how big do you think that is? Perhaps that big? Or maybe that big? Well let me show you. Here’s a replica of one such seal. It’s only about one inch by one inch in size — pretty tiny. So what were these used for? We know that these were used for stamping clay tags that were attached to bundles of goods that were sent from one place to the other. So you know those packing slips you get on your FedEx boxes? These were used to make those kinds of packing slips. You might wonder what these objects contain in terms of their text. Perhaps they’re the name of the sender or some information about the goods that are being sent from one place to the other — we don’t know. We need to decipher the script to answer that question.

(P5) Deciphering the script is not just an intellectual puzzle; it’s actually become a question that’s become deeply intertwined with the politics and the cultural history of South Asia. In fact, the script has become a battleground of sorts between three different groups of people. First, there’s a group of people who are very passionate in their belief that the Indus script does not represent a language at all. These people believe that the symbols are very similar to the kind of symbols you find on traffic signs or the emblems you find on shields. There’s a second group of people who believe that the Indus script represents an Indo-European language. If you look at a map of India today, you’ll see that most of the languages spoken in North India belong to the Indo-European language family. So some people believe that the Indus script represents an ancient Indo-European language such as Sanskrit.

(P6) There’s a last group of people who believe that the Indus people were the ancestors of people living in South India today. These people believe that the Indus script represents an ancient form of the Dravidian language family, which is the language family spoken in much of South India today. And the proponents of this theory point to that small pocket of Dravidian-speaking people in the North, actually near Afghanistan, and they say that perhaps, sometime in the past, Dravidian languages were spoken all over India and that this suggests that the Indus civilization is perhaps also Dravidian.

(P7) Which of these hypotheses can be true? We don’t know, but perhaps if you deciphered the script, you would be able to answer this question. But deciphering the script is a very challenging task. First, there’s no Rosetta Stone. I don’t mean the software; I mean an ancient artifact that contains in the same text both a known text and an unknown text. We don’t have such an artifact for the Indus script. And furthermore, we don’t even know what language they spoke. And to make matters even worse, most of the text that we have are extremely short. So as I showed you, they’re usually found on these seals that are very, very tiny.

(P8) And so given these formidable obstacles, one might wonder and worry whether one will ever be able to decipher the Indus script. In the rest of my talk, I’d like to tell you about how I learned to stop worrying and love the challenge posed by the Indus script. I’ve always been fascinated by the Indus script ever since I read about it in a middle school textbook. And why was I fascinated? Well it’s the last major undeciphered script in the ancient world. My career path led me to become a computational neuroscientist, so in my day job, I create computer models of the brain to try to understand how the brain makes predictions, how the brain makes decisions, how the brain learns and so on.

(P9) But in 2007, my path crossed again with the Indus script. That’s when I was in India, and I had the wonderful opportunity to meet with some Indian scientists who were using computer models to try to analyze the script. And so it was then that I realized there was an opportunity for me to collaborate with these scientists, and so I jumped at that opportunity. And I’d like to describe some of the results that we have found. Or better yet, let’s all collectively decipher. Are you ready?

(P10) The first thing that you need to do when you have an undeciphered script is try to figure out the direction of writing. Here are two texts that contain some symbols on them. Can you tell me if the direction of writing is right to left or left to right? I’ll give you a couple of seconds. Okay. Right to left, how many? Okay. Okay. Left to right? Oh, it’s almost 50/50. Okay. The answer is: if you look at the left-hand side of the two texts, you’ll notice that there’s a cramping of signs, and it seems like 4,000 years ago, when the scribe was writing from right to left, they ran out of space. And so they had to cram the sign. One of the signs is also below the text on the top. This suggests the direction of writing was probably from right to left, and so that’s one of the first things we know, that directionality is a very key aspect of linguistic scripts. And the Indus script now has this particular property.

(P11) What other properties of language does the script show? Languages contain patterns. If I give you the letter Q and ask you to predict the next letter, what do you think that would be? Most of you said U, which is right. Now if I asked you to predict one more letter, what do you think that would be? Now there’s several thoughts. There’s E. It could be I. It could be A, but certainly not B, C or D, right? The Indus script also exhibits similar kinds of patterns. There’s a lot of text that start with this diamond-shaped symbol. And this in turn tends to be followed by this quotation marks-like symbol. And this is very similar to a Q and U example. This symbol can in turn be followed by these fish-like symbols and some other signs, but never by these other signs at the bottom. And furthermore, there’s some signs that really prefer the end of texts, such as this jar-shaped sign, and this sign, in fact, happens to be the most frequently occurring sign in the script.

(P12) Given such patterns, here was our idea. The idea was to use a computer to learn these patterns, and so we gave the computer the existing texts. And the computer learned a statistical model of which symbols tend to occur together and which symbols tend to follow each other. Given the computer model, we can test the model by essentially quizzing it. So we could deliberately erase some symbols, and we can ask it to predict the missing symbols. Here are some examples. You may regard this as perhaps the most ancient game of Wheel of Fortune.

(P13) What we found was that the computer was successful in 75 percent of the cases in predicting the correct symbol. In the rest of the cases, typically the second best guess or third best guess was the right answer. There’s also practical use for this particular procedure. There’s a lot of these texts that are damaged. Here’s an example of one such text. And we can use the computer model now to try to complete this text and make a best guess prediction. Here’s an example of a symbol that was predicted. And this could be really useful as we try to decipher the script by generating more data that we can analyze.

(P14) Now here’s one other thing you can do with the computer model. So imagine a monkey sitting at a keyboard. I think you might get a random jumble of letters that looks like this. Such a random jumble of letters is said to have a very high entropy. This is a physics and information theory term. But just imagine it’s a really random jumble of letters. How many of you have ever spilled coffee on a keyboard? You might have encountered the stuck-key problem — so basically the same symbol being repeated over and over again. This kind of a sequence is said to have a very low entropy because there’s no variation at all. Language, on the other hand, has an intermediate level of entropy; it’s neither too rigid, nor is it too random. What about the Indus script? Here’s a graph that plots the entropies of a whole bunch of sequences. At the very top you find the uniformly random sequence, which is a random jumble of letters — and interestingly, we also find the DNA sequence from the human genome and instrumental music. And both of these are very, very flexible, which is why you find them in the very high range. At the lower end of the scale, you find a rigid sequence, a sequence of all A’s, and you also find a computer program, in this case in the language Fortran, which obeys really strict rules. Linguistic scripts occupy the middle range.

(P15) Now what about the Indus script? We found that the Indus script actually falls within the range of the linguistic scripts. When this result was first published, it was highly controversial. There were people who raised a hue and cry, and these people were the ones who believed that the Indus script does not represent language. I even started to get some hate mail. My students said that I should really seriously consider getting some protection. Who’d have thought that deciphering could be a dangerous profession? What does this result really show? It shows that the Indus script shares an important property of language. So, as the old saying goes, if it looks like a linguistic script and it acts like a linguistic script, then perhaps we may have a linguistic script on our hands. What other evidence is there that the script could actually encode language?

(P16) Well linguistic scripts can actually encode multiple languages. So for example, here’s the same sentence written in English and the same sentence written in Dutch using the same letters of the alphabet. If you don’t know Dutch and you only know English and I give you some words in Dutch, you’ll tell me that these words contain some very unusual patterns. Some things are not right, and you’ll say these words are probably not English words. The same thing happens in the case of the Indus script. The computer found several texts — two of them are shown here — that have very unusual patterns. So for example the first text: there’s a doubling of this jar-shaped sign. This sign is the most frequently-occurring sign in the Indus script, and it’s only in this text that it occurs as a doubling pair.

(P17) Why is that the case? We went back and looked at where these particular texts were found, and it turns out that they were found very, very far away from the Indus Valley. They were found in present day Iraq and Iran. And why were they found there? What I haven’t told you is that the Indus people were very, very enterprising. They used to trade with people pretty far away from where they lived, and so in this case, they were traveling by sea all the way to Mesopotamia, present-day Iraq. And what seems to have happened here is that the Indus traders, the merchants, were using this script to write a foreign language. It’s just like our English and Dutch example. And that would explain why we have these strange patterns that are very different from the kinds of patterns you see in the text that are found within the Indus Valley. This suggests that the same script, the Indus script, could be used to write different languages. The results we have so far seem to point to the conclusion that the Indus script probably does represent language.

(P18) If it does represent language, then how do we read the symbols? That’s our next big challenge. So you’ll notice that many of the symbols look like pictures of humans, of insects, of fishes, of birds. Most ancient scripts use the rebus principle, which is, using pictures to represent words. So as an example, here’s a word. Can you write it using pictures? I’ll give you a couple seconds. Got it? Okay. Great. Here’s my solution. You could use the picture of a bee followed by a picture of a leaf –and that’s “belief,” right. There could be other solutions. In the case of the Indus script, the problem is the reverse. You have to figure out the sounds of each of these pictures such that the entire sequence makes sense. So this is just like a crossword puzzle, except that this is the mother of all crossword puzzles because the stakes are so high if you solve it.

(P19) My colleagues, Iravatham Mahadevan and Asko Parpola, have been making some headway on this particular problem. And I’d like to give you a quick example of Parpola’s work. Here’s a really short text. It contains seven vertical strokes followed by this fish-like sign. And I want to mention that these seals were used for stamping clay tags that were attached to bundles of goods, so it’s quite likely that these tags, at least some of them, contain names of merchants. And it turns out that in India there’s a long tradition of names being based on horoscopes and star constellations present at the time of birth. In Dravidian languages, the word for fish is “meen” which happens to sound just like the word for star. And so seven stars would stand for “elu meen,” which is the Dravidian word for the Big Dipper star constellation. Similarly, there’s another sequence of six stars, and that translates to “aru meen,” which is the old Dravidian name for the star constellation Pleiades. And finally, there’s other combinations, such as this fish sign with something that looks like a roof on top of it. And that could be translated into “mey meen,” which is the old Dravidian name for the planet Saturn. So that was pretty exciting. It looks like we’re getting somewhere.

(P20) But does this prove that these seals contain Dravidian names based on planets and star constellations? Well not yet. So we have no way of validating these particular readings, but if more and more of these readings start making sense, and if longer and longer sequences appear to be correct, then we know that we are on the right track. Today, we can write a word such as TED in Egyptian hieroglyphics and in cuneiform script, because both of these were deciphered in the 19th century. The decipherment of these two scripts enabled these civilizations to speak to us again directly. The Mayans started speaking to us in the 20th century, but the Indus civilization remains silent.

(P21) Why should we care? The Indus civilization does not belong to just the South Indians or the North Indians or the Pakistanis; it belongs to all of us. These are our ancestors — yours and mine. They were silenced by an unfortunate accident of history. If we decipher the script, we would enable them to speak to us again. What would they tell us? What would we find out about them? About us? I can’t wait to find out.

Thank you. (Applause)

Words: 2,996
Source: http://www.ted.com/talks/rajesh_rao_computing_a_rosetta_stone_for_the_indus_script
To print: https://www.dropbox.com/s/07q5u6hnez4txxj/%5BV019%5D%20A%20Rosetta%20Stone%20for%20a%20lost%20language.pdf?dl=0


Discussion Questions

If you found the passage difficult to read or had problems understanding specific words or idiomatic expressions, please discuss them with your tutor.

The following discussion questions should be answered in your own words and with your own arguments.

  1. Briefly summarize the speech in your own words.
  2. Describe how a computational neuroscientist became involved with deciphering an ancient script, something that an archeologist would do. What aspects of the job do they have in common? (HINT: identifying patterns (P11), using statistical model (P12), entropy vs. rigid rules (P14))
  3. What patterns did Rao identify while comparing sentences written in English and Dutch, and how did he apply this finding in his Indus script research?
  4. A bit of a stretch but something to think about: do you think the universe has high entropy or a very rigid pattern? Why do you think so? (This idea comes from Michael Foucault’s The Prose of the World)