The Multiverse Has 11 Dimensions
Michio Kaku
Dr. Michio Kaku is the co-founder of string field theory, and is one of the most widely recognized scientists in the world today. He has written 4 New York Times Best Sellers, is the science correspondent for CBS This Morning and has hosted numerous science specials for BBC-TV, the Discovery/Science Channel. His radio show broadcasts to 100 radio stations every week. Dr. Kaku holds the Henry Semat Chair and Professorship in theoretical physics at the City College of New York (CUNY), where he has taught for over 25 years. He has also been a visiting professor at the Institute for Advanced Study as well as New York University (NYU).
Question: Are there only three dimensions in other universes or could there be more? (Submitted by Andre Lapiere)
Michio Kaku: Andre, we believe, though we cannot yet prove, that our multiverse of universes is 11-dimensional. So think of this 11-dimensional arena and in this arena there are bubbles, bubbles that float and the skin of the bubble represents an entire universe, so we’re like flies trapped on fly paper. We’re on the skin of a bubble. It’s a three dimensional bubble. The three dimensional bubble is expanding and that is called the Big Bang theory and sometimes these bubbles can bump into each other, sometimes they can split apart and that we think is the Big Bang. So we even have a theory of the Big Bang itself. Now you ask a question what about the dimensions of each bubble. Well in string theory—which is what I do for a living; that's my day job—in string theory we can have bubbles of different dimensions. The highest dimension is 11. You cannot go beyond 11 because universes become unstable beyond 11. If I write down the theory of a 13-, 15-dimensional universe it’s unstable and it collapses down to an 11-dimensional universe. But within 11 dimensions you can have bubbles that are 3 dimensional, 4-dimensional, 5-dimensional. These are membranes, so for short we call them branes. So these branes can exist in different dimensions and let’s say P represents the dimension of each bubble, so we call them p-branes. So a p-brane is a universe in different dimensions floating in a much larger arena, and this larger arena is the hyperspace that I talked about originally.
Also remember that each bubble vibrates, and each bubble vibrating creates music. The music of these membranes is the subatomic particles. Each subatomic particle represents a note on a vibrating string or vibrating membranes. So, believe it or not, we now have a candidate for the "Mind of God" that Albert Einstein wrote about for the last 30 years of his life. The "Mind of God" in this picture would be cosmic music resonating throughout 11-dimensional hyperspace.
Recorded September 29, 2010
Interviewed by Paul Hoffman
The physicist explains why other universes in the mulitverse could have many more dimensions—and could comprise Einstein's "Mind of God."
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A brief history of human dignity
What is human dignity? Here's a primer, told through 200 years of great essays, lectures, and novels.
30 November, 2020
Credit: Benjavisa Ruangvaree / AdobeStock
Sponsored by the Institute for Humane Studies
- Human dignity means that each of our lives have an unimpeachable value simply because we are human, and therefore we are deserving of a baseline level of respect.
- That baseline requires more than the absence of violence, discrimination, and authoritarianism. It means giving individuals the freedom to pursue their own happiness and purpose.
- We look at incredible writings from the last 200 years that illustrate the push for human dignity in regards to slavery, equality, communism, free speech and education.
<p>In a <em>New York Times</em> <a href="https://www.nytimes.com/2020/07/30/opinion/john-lewis-civil-rights-america.html" target="_blank">essay</a> published the day of his funeral on July 30, 2020, Congressman John Lewis wrote that his "last days and hours"—in which he watched widespread protests over George Floyd's murder and saw a square in downtown D.C. christened Black Lives Matter Plaza—filled him with hope. "Around the country and the world you set aside race, class, age, language and nationality to demand respect for human dignity."</p>
<p>Human dignity is a powerful phrase invoked to peacefully protest against violence, discrimination, and authoritarianism. But when we talk about human dignity, what do we mean?</p>
The inherent worth of all human beings
<p>Human dignity is the inherent worth of each individual human being. Recognizing human dignity means respecting human beings' special value—value that sets us apart from other animals; value that is intrinsic and cannot be lost.</p> <p>Liberalism—the broad political philosophy that organizes society around liberty, justice, and equality—is rooted in the idea of human dignity. Liberalism assumes each of our lives, plans, and preferences have some unimpeachable value, not because of any objective evaluation or contribution to a greater good, but simply because they belong to a human being. We are human, and therefore deserving of a baseline level of respect. </p> <p>Because so many of us take human dignity for granted—just a fact of our humanness—it's usually only when someone's dignity is ignored or violated that we feel compelled to talk about it. </p> <p>But human dignity means more than the absence of violence, discrimination, and authoritarianism. It means giving individuals the freedom to pursue their own happiness and purpose—a freedom that can be hampered by restrictive social institutions or the tyranny of the majority. The liberal ideal of the good society is not just peaceful but also pluralistic: It is a society in which we respect others' right to think and live differently than we do.</p>From the 19th century to today
<p>With <a href="https://books.google.com/ngrams/graph?year_start=1800&year_end=2019&content=human+dignity&corpus=26&smoothing=3&direct_url=t1%3B%2Chuman%20dignity%3B%2Cc0" target="_blank" rel="noopener noreferrer">Google Books Ngram Viewer</a>, we can chart mentions of human dignity from 1800-2019.</p><img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0ODU0My9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTY1MTUwMzE4MX0.bu0D_0uQuyNLyJjfRESNhu7twkJ5nxu8pQtfa1w3hZs/img.png?width=980" id="7ef38" class="rm-shortcode" data-rm-shortcode-id="9974c7bef3812fcb36858f325889e3c6" data-rm-shortcode-name="rebelmouse-image" /><p>We can also map human dignity against mentions of liberalism to see that discussion of human dignity increased with discussion of liberalism. </p><img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0ODU0NS9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTYxNjM0ODMzM30.BzxT9Y1Zg5nE-PuQ2enrBn8FXs3HauET23enIw9rH34/img.png?width=980" id="9a5d2" class="rm-shortcode" data-rm-shortcode-id="0f2270501d92035c19cad5fc758b55e1" data-rm-shortcode-name="rebelmouse-image" />
<p>Then we can search through individual mentions to find how human dignity was discussed and understood over the last 200 years.</p>
<p>For example, German rabbi Dr. Samuel Hirsch gave a lecture in 1853 on "<a href="https://www.google.com/books/edition/The_Advocate/s1ccAQAAMAAJ?hl=en&gbpv=1&dq=%22human+dignity%22&pg=PA421&printsec=frontcover" target="_blank" rel="noopener noreferrer">The Religion of Humanity</a>" in which he condemned slavery. "That which we love in ourselves, our true human dignity, compels us to recognize and love the same human dignity in all others," Hirsh said. He wrote:</p>
<p style="margin-left: 20px;">If I can look upon my brother-man as a creature, as a thing void of any will of his own, instead of as a free personality, that furnishes ample proof that I have not yet recognized the true human dignity in myself. To own slaves is spiritual suicide and homicide. This sin is in no way excusable on account of the kind treatment accorded to the slaves by their owner, as he never can treat them humanely. When man becomes a piece of property he is robbed of his human dignity. </p>
<p>In 1917, Kansas State Normal School <a href="https://www.google.com/books/edition/Teaching/JMTSWAhrxSMC?hl=en&gbpv=1&dq=%22human+dignity%22&pg=RA20-PA16&printsec=frontcover" target="_blank" rel="noopener noreferrer">published</a> a journal on teaching that called for instructors to help each pupil "make completer use of his one lifetime" because "an abundant life, a life of awareness, a life of dignity is an undertaking worthy of gods." </p>
<p>Thomas Bell's 1941 novel <a href="https://www.google.com/books/edition/Out_Of_This_Furnace/TWLtI_V5YB4C?hl=en&gbpv=1&dq=%22human+dignity%22&pg=PA411&printsec=frontcover" target="_blank" rel="noopener noreferrer"><em>Out of the Furnace</em></a> centered on an immigrant Slovak family in Pennsylvania. A character muses that it wasn't "where you were born or how you spelled your name or where your father had come from" that mattered; instead,</p>
<p style="margin-left: 20px;">It was the way you thought and felt about certain things. About freedom of speech and the equality of men and the importance of having one law—the same law—for rich and poor, for the people you liked and the people you didn't like. About the right of every man to live his life as he thought best, his right to defend it if anyone tried to change it and his right to change it himself if he decided he liked some other way of living better…. About human dignity, which helped a man live proudly and distinguished his death from animals; and finally, about the value to be put on a human life, one's enemy's no less than one's own. </p>
<p>In a 1953 <a href="https://www.google.com/books/edition/Progress_and_Human_Dignity/i4BMAQAAMAAJ?hl=en&gbpv=1&dq=%22human+dignity%22&pg=PP8&printsec=frontcover" target="_blank" rel="noopener noreferrer">speech</a>, then Secretary of State John Foster Dulles argued that communist countries might be able to achieve short-term material gain, but "results so produced are not a glory but a shame. They are achieved by desecrating the dignity of the human individual." Dulles believed human dignity meant being entitled to a life that included physical well-being and "freedom to think, to believe, and to communicate with one's fellows," "opportunities which permit some exercise of individual choices," and "the contemplation and enjoyment of what is beautiful." </p>
<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0ODU4OC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYzNTkzNDQwMX0.oF6SRe8h4isr9BMUowNloz-wDivX95L8Gr739uCooIo/img.jpg?width=980" id="363c2" class="rm-shortcode" data-rm-shortcode-id="f90e6b1f91456d023b5cf3f376463ede" data-rm-shortcode-name="rebelmouse-image" />
American novelist, writer, playwright, poet, essayist and civil rights activist James Baldwin at his home in Saint-Paul-de-Vence, southern France, on November 6, 1979.
Credit: Ralph Gatti/AFP via Getty Images
<p>One hundred years after U.S. law stopped allowing Black Americans to be treated as property, Black writer James Baldwin was still <a href="https://www.forbes.com/sites/emilychamleewright/2020/06/30/living-up-to-the-liberal-promise/#784c5cc65139" target="_blank">calling</a> for Black Americans' dignity to be equally recognized. It was not enough, not nearly enough, that the 14th Amendment ensured equal protection of the laws; what mattered was how Black Americans were treated by their fellow human beings. In a 1960 Canadian television <a href="https://www.youtube.com/watch?v=YPaBXcEVpOE" target="_blank">interview</a>, Baldwin said, "I don't know what white people see, you know, when they look at a Negro anymore. But I do know very well—I realized when I was very young—that whatever he was looking at, it wasn't me… I was not a <em>man</em>."</p><p>In his seminal 1963 book <a href="https://www.amazon.com/Fire-Next-Time-James-Baldwin/dp/067974472X" target="_blank"><em>The Fire Next Time</em></a>, Baldwin seemed to echo Dr. Hirsh's argument from a century earlier:</p><p style="margin-left: 20px;">I am very much concerned that American Negroes achieve their freedom here in the United States. But I am also concerned for their dignity, for the health of their souls, and must oppose any attempt that Negroes may make to do to others what has been done to them. I think I know—we see it around us every day—the spiritual wasteland to which that road leads. It is so simple a fact and one that is so hard, apparently, to grasp: <em>Whoever debases others debases himself.</em></p><p>This, then, is a common thread in our historic understanding of human dignity: Anyone who treats another human being as less than human undermines <em>their own</em> human dignity in addition to undermining the dignity of their victim.</p>A 1964 <em>New York University Law Review</em> <a href="https://www.google.com/books/edition/Philosophical_Dimensions_of_Privacy/q_FrmXyl3hUC?hl=en&gbpv=1&dq=%22human+dignity%22&pg=PA156&printsec=frontcover" target="_blank" rel="noopener noreferrer">article</a> argued that privacy was a key aspect of human dignity. "A man whose home may be entered at the will of another, whose conversation may be overheard at the will of another, whose marital and familial intimacies may be overseen at the will of another, is less of a man, has less human dignity, on that account," wrote author Edward J. Bloustein, who later became president of Rutgers University.
The future of dignity
<p>Around the world, people are still working toward the full and equal recognition of human dignity. Every year, new speeches and writings help us understand what dignity is—not only what it looks like when dignity is violated but also what it looks like when dignity is honored. In his posthumous essay, Congressman Lewis wrote, "When historians pick up their pens to write the story of the 21st century, let them say that it was your generation who laid down the heavy burdens of hate at last and that peace finally triumphed over violence, aggression and war."</p> <p>The more we talk about human dignity, the better we understand it. And the sooner we can make progress toward a shared vision of peace, freedom, and mutual respect for all. </p>
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'The time is now' for cryptocurrencies, PayPal CEO says
Is Bitcoin akin to 'digital gold'?
04 December, 2020
Credit: André François McKenzie on Unsplash
Technology & Innovation
- In October, PayPal announced that it would begin allowing users to buy, sell, and hold cryptocurrencies.
- Other major fintech companies—Square, Fidelity, SoFi—have also recently begun investing heavily in cryptocurrencies.
- While prices are volatile, many investors believe cryptocurrencies are a relatively safe bet because blockchain technology will prove itself over the long term.
<p>PayPal CEO Dan Schulman sees a silver lining amid the chaos of the COVID-19 pandemic: It's accelerating cryptocurrency adoption at a rapid clip, potentially by years.<br></p><p>Speaking in front of a digital audience at the <a href="https://websummit.com/schedule/timeslot/the-cashless-era-in-conversation-with-dan-schulman" target="_blank" rel="noopener noreferrer">2020 Web Summit</a>, Schulman added that he's optimistic about the future of cryptocurrencies:</p><p style="margin-left: 20px;">"I think that if you can create a financial system, a new and modern technology that is faster, that is less expensive, more efficient, that's good for bringing more people into the system, for inclusion, to help drive down costs, to help drive financial health for so many people. [...] So, over the long run, I'm very bullish on digital currencies of all kinds."</p><p>His bullishness might be unsurprising, considering PayPal is among the latest fintech companies to move into the cryptocurrency space. In October, PayPal <a href="https://www.paypal.com/us/smarthelp/article/cryptocurrency-on-paypal-faq-faq4398?app=searchAutoComplete" target="_blank" rel="noopener noreferrer">announced</a> that users would soon be able to buy, sell, and hold cryptocurrencies "directly through PayPal using their Cash or Cash Plus account." That went into effect in November, and the company plans to extend it to Venmo users in 2021.</p>
<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg2NjgwMi9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTYxMTQzMjY5N30.Gz0OFuZvV_yzQCImT9Fz0KsITIJGHIMWHcizCKlzXEI/img.png?width=980" id="5118a" class="rm-shortcode" data-rm-shortcode-id="2a95f9f17ee78d09d15a4b6518a887aa" data-rm-shortcode-name="rebelmouse-image" />
Presentation slide from Sanja Kon's presentation on the evolution of money at 2020 Web Summit
Credit: Sanja Kon
<p>The move came shortly after the payments company Square invested $50 million into Bitcoin, and after Fidelity announced that it was opening a Bitcoin fund into which qualified purchasers could invest <a href="https://www.bloomberg.com/news/articles/2020-08-26/fidelity-launches-inaugural-bitcoin-fund-for-wealthy-investors" target="_blank">(minimum investment: $100,000)</a>. Together, this institutional backing might have something to do with Bitcoin's recent surge back to near its 2017 price peak of $19,783. (Bitcoin is listed at 19,384.30 as of Dec. 3.)<br></p><img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg2NjgwNi9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTYyNDU1MjU4Mn0.iY4_nt4qUx9M83j4tZfMG3mnwj2yRuzRz370Ja663Cw/img.png?width=980" id="ca650" class="rm-shortcode" data-rm-shortcode-id="85510e5bd2cf0039e69aa0ac8dbb0234" data-rm-shortcode-name="rebelmouse-image" />
Presentation slide from Sanja Kon's presentation on the evolution of money at 2020 Web Summit
Credit: Sanja Kon
<p>But more importantly, it suggests cryptocurrencies might soon have the opportunity to prove themselves in real-world use cases. After all, skeptics have long doubted the ability of cryptocurrencies to go mainstream as a form of everyday payment. But people seem increasingly comfortable with digital payment systems.</p><p style="margin-left: 20px;">"The entire world is going to come into digital first," Schulman said at Web Summit, adding that PayPal's services already go hand-in-hand with cryptocurrencies. "As we thought about it, digital wallets are a natural complement to digital currencies. We've got over 360 million digital wallets and we need to embrace cryptocurrencies."</p><p>Sanja Kon, vice president of global partnerships at the cryptocurrency payments processor company UTRUST, also spoke at Web Summit about the increasing adoption of digital payments:</p><p style="margin-left: 20px;">"Physical cash is becoming more and more obsolete. And the next step in the evolution is digital currency."</p><p>Kon noted some of the inherent advantages of cryptocurrencies, namely ownership. </p><p style="margin-left: 20px;">"For many people, this is really the main benefit of cryptocurrency: Users owning cryptocurrencies are able to control how they spend their money without dealing with any intermediary authority like a bank or a government, for example," Kon said, adding that there are no bank fees associated with cryptocurrencies, and that international transaction fees are significantly lower than wire transfers of fiat currency.</p><p>Kon said cryptocurrencies have unique growth opportunities in areas where people aren't integrated into modern banking systems:</p><p style="margin-left: 20px;">"With cryptocurrencies and blockchain, with the use of just a smartphone and access to internet, Bitcoin and cryptocurrencies can be available to populations of people and users without access to the traditional banking system."</p>Bitcoin as 'digital gold'
<p>Still, it could take years for people to start using cryptocurrencies for everyday purchases on a large scale. Despite this, many cryptocurrency advocates see digital currencies, particularly Bitcoin, as a way to store value—digital gold, essentially.</p><p style="margin-left: 20px;">"I don't think Bitcoin is going to be used as a transactional currency anytime in the next five years," billionaire investor Mike Novogratz recently told <a href="https://www.bloomberg.com/news/articles/2020-10-23/novogratz-says-bitcoin-is-digital-gold-not-a-currency-for-now?srnd=markets-vp" target="_blank">Bloomberg</a>. "Bitcoin is being used as a store of value. [...] "Bitcoin as a gold, as digital gold, is just going to keep going higher. More and more people are going to want it as some portion of their portfolio."</p><p>There are obvious parallels between gold and Bitcoin: Both are mined, do not degrade over time, are finite in supply, and aren't directly tied to the value of fiat currency, making them <a href="https://www.reuters.com/article/us-gold-inflation/gold-as-an-inflation-hedge-well-sort-of-idUSKCN1GD516" target="_blank" rel="noopener noreferrer">relatively invulnerable to inflation</a>. The obvious objection is that the price of Bitcoin, and cryptocurrencies in general, is far more volatile than gold.</p><p>But for investors who believe the inherent value of cryptocurrency technology will prove itself over the long term, these price fluctuations are just bumps on the long road to the future of currency. </p><p style="margin-left: 20px;">"It's no longer a debate if crypto is a thing, if Bitcoin is an asset, if the blockchain is going to be part of the financial infrastructure," Novogratz said. "It's not if, it's when, and so every single company has to have a plan now."</p>
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"Clean meat" approved for sale in Singapore
Singapore has approved the sale of a lab-grown meat product in an effort to secure its food supplies against disease and climate change.
04 December, 2020
Credit: Adobe Stock / Big Think
Politics & Current Affairs
<ul class="ee-ul"></ul>
<p>Singapore faces a problem. The city-state currently imports the bulk of its food from overseas, producing <a href="https://www.sfa.gov.sg/food-farming/singapore-food-supply/the-food-we-eat" target="_blank">only 10 percent domestically</a>. This state of affairs leaves Singapore in a vulnerable position. An outbreak of disease, for example, could have outsized consequences on the country's food supply. So could the souring of fruitful political or economic partnerships. Looking into the future, climate change and population growth could see today's trade-friendly ports shuttered with closed signs as global food supplies become more tenuous.</p><p>In light of this reality, Singaporean leaders are doing something drastic and unprecedented for a world government—they're planning ahead.</p><p>Under the "<a href="https://earth.org/singapore-30-by-30-plan/" target="_blank">30-by-30</a>" Plan, Singapore aims to produce 30 percent of its food by the year 2030. But unlike the dominant <a href="https://www.investopedia.com/articles/investing/100615/4-countries-produce-most-food.asp" target="_blank" rel="noopener noreferrer">food-producing countries</a>—China, India, the U.S., and Brazil—this tiny island nation lacks the acreage to dedicate to traditional agriculture, so they've turned to modern technology. To produce more with less, the Singapore Food Agency is experimenting with rooftop gardens, high-rise hydroponic farms, and high-yield genetic crops.</p><p>Singapore is also looking at lab-grown meat as a sustainable, secure alternative to today's factory farming. In a recent step toward that future, its officials have given regulatory approval <a href="https://www.msn.com/en-us/news/us/lab-grown-chicken-bites-cultured-meat-product-gets-worlds-first-regulatory-approval/ar-BB1byNEA?li=BBnbfcL" target="_blank" rel="noopener noreferrer">to sell lab-grown meat</a>.</p>
Approve for your dining pleasure
<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="dd3f57f8baf14e654812d30a309d1f17"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/307gysA18_E?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span><p><a href="https://www.ju.st/en-us" target="_blank" rel="noopener noreferrer">Eat Just</a>, a company that produces animal-alternative food products, announced the news earlier this week. In what the company is calling a world first, Singapore has given it permission for a small-scale commercial launch of their GOOD Meat brand product line. For the initial run, the cultured chicken meat will be sold as an ingredient in "chicken bites."</p><p>"Singapore has long been a leader in innovation of all kinds, from information technology to biologics to now leading the world in building a healthier, safer food system. I'm sure that our regulatory approval for cultured meat will be the first of many in Singapore and in countries around the globe," Josh Tetrick, co-founder and CEO of Eat Just, <a href="https://www.businesswire.com/news/home/20201201006251/en/Eat-Just-Granted-World%E2%80%99s-First-Regulatory-Approval-for-Cultured-Meat" target="_blank" rel="noopener noreferrer">said in a release</a>.</p><p>According to the release, Eat Just underwent an extensive safety review by the Singapore Food Agency. It provided officials "details on the purity, identity and stability of chicken cells during the manufacturing process, as well as a detailed description of the manufacturing process which demonstrated that harvested cultured chicken met quality controls and a rigorous food safety monitoring system." It also demonstrated the consistency of its production by running more than 20 cycles in its 1,200-liter bioreactors.</p><p>While Eat Just did not offer details on its propriety process, it likely follows <a href="https://www.newscientist.com/article/mg24032080-400-accelerating-the-cultured-meat-revolution/" target="_blank" rel="noopener noreferrer">one similar to other lab-grown meats</a>. It starts with muscle cell samples drawn from a living animal. Technicians then isolate stem cells from the sample and culture them <em>in vitro</em>. These cultured stem cells are then placed in a bioreactor, essentially a fermenter for fleshy cells. The bioreactor contains scaffolding materials to keep the growing tissue from falling apart as well as a growth material—the sugars, salts, and other nutrients the tissue needs to grow. As the cells grow, they begin to differentiate into the muscle, fat, and other cells of meat tissue. Once grown, the tissues are formed into a meat product to be shipped to restaurants and supermarkets.</p>An abattoir abatement?
<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg2Mjg5OS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYyODg1NDI3N30.AYmFJfWQbPjK-o1IatyFHL-OLjcfXBMmQKYyvz4oT3s/img.jpg?width=980" id="8a82d" class="rm-shortcode" data-rm-shortcode-id="93f824fe4c6f397ab2b65e4665847e71" data-rm-shortcode-name="rebelmouse-image" />A graph showing the number of animals slaughtered in the United States per year from 1961–2018.
Credit: Our World in Data
<p>Singapore's approval is an important step in support for clean meats—so-called because they don't require animal slaughter and would likely leave a reduced carbon footprint—but hurdles remain before widespread adoption is possible.</p><p>The most glaring is the price. The first lab-grown hamburger was eaten in London in 2013. <a href="https://www.bbc.com/news/science-environment-23576143" target="_blank" rel="noopener noreferrer">It cost roughly $330,000</a>. As with any new technology, investment, iteration, and improved manufacturing will see the price drop substantially and quickly. For comparison, Eat Just's chicken will be priced equivalent to premium chicken.</p><p>Other hurdles include up-scaling production, <a href="https://www.nature.com/articles/d41586-019-00373-w" target="_blank" rel="noopener noreferrer">the need for further research</a>, and developing techniques to reliably produce in-demand meats such as fish and beef. Finally, not all countries may be as receptive as Singapore. Countries with large, entrenched meat industries may protect this legacy industry through a protracted and difficult regulatory process. Though, the meat industry itself is investing in lab-grown meat. Tyson Foods, for example, has <a href="https://euromeatnews.com/Article-Tyson-Foods-announces-investment-in-clean-meat/697" target="_blank" rel="noopener noreferrer">invested in the food-tech startup Memphis Meats</a>, the company that debuted the world's first beef meatball.</p><p>"I would imagine what will happen is the U.S., Western Europe and others will see what Singapore has been able to do, the rigours of the framework that they put together. And I would imagine that they will try to use it as a template to put their own framework together," <a href="https://www.reuters.com/article/us-eat-just-singapore/singapore-approves-sale-of-lab-grown-meat-in-world-first-idUSKBN28C06Z" target="_blank" rel="noopener noreferrer">Tetrick told Reuter's during an interview</a>.</p><p>Regardless of the challenges, the demand for meat substitutes is present and growing. In 2020, plant-based substitutes like Beyond Meat and Impossible foods <a href="https://bigthink.com/coronavirus/plant-based-meat" target="_self">gained a significant foothold in supermarkets</a> as meat-packing factories became coronavirus hotspots. The looming threat of climate change has also turned people away from meat as animal products. Livestock production is environmentally taxing and leaves <a href="http://css.umich.edu/factsheets/carbon-footprint-factsheet" target="_blank" rel="noopener noreferrer">a much larger carbon footprint</a> than grain and vegetable production. </p><p>Then there's the moral concern of animal cruelty. In 2018 alone, 302 million cows, 656 million turkeys, 1.48 billion pigs, and a gob-smacking 68 billion chickens were <a href="https://ourworldindata.org/grapher/animals-slaughtered-for-meat" target="_blank" rel="noopener noreferrer">slaughtered for meat worldwide</a>. And those figures do not include chickens killed in dairy or egg production.</p><p>If brought to scale and widely available, clean meats could become serious competitors to traditional meat. <a href="https://bigthink.com/technology-innovation/meat-alternatives" target="_self">One report has even predicted</a> that 60 percent of the meat people eat by 2040 won't come from slaughtered animals. It could be just the thing for people looking for a meat substitute but who find tofurkey as distasteful as, well tofurkey.</p>
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Astrophysicists: Gamma-ray jets exceed the speed of light
Scientists find that bursts of gamma rays may exceed the speed of light and cause time-reversibility.
25 September, 2019
Credit: DESY, Science Communication Lab (used with permission by Astronomy Picture of the Day, which is co-managed by Robert Nemiroff at Michigan Tech).
Surprising Science
- Astrophysicists propose that gamma-ray bursts may exceed the speed of light.
- The superluminal jets may also be responsible for time-reversibility.
- The finding doesn't go against Einstein's theory because this effect happens in the jet medium not a vacuum.
<p><br></p></div>
<p>According to Einstein's theory of general relativity, nothing can travel faster than the speed of light in a vacuum. Yet in space many strange things happen, including a new proposal by two astrophysicists that blasts creating bursts of gamma rays may be able to speed up faster than light, going <strong>superluminal</strong>. </p><p>Yet, this research by the astrophysicists <strong>Jon Hakkila</strong> of the College of Charleston and <strong>Robert Nemiroff</strong> of the Michigan Technological University is not going against Einstein's theory. What the scientists found is that while these bursts surpass the speed of light in surrounding gas clouds, that only happens in the jet mediums, not in a vacuum. </p><p>The astrophysicists also think that these superluminal jets can create the time-reversibility that can be observed in gamma-ray burst light curves.</p>
<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMTE0NTY0Ni9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY1OTA1NzM1M30.ICvbYf95MO_q5VbgTeoKCnBbkJ72nq2CzoPZrd_zjOY/img.jpg?width=980" id="1c99e" class="rm-shortcode" data-rm-shortcode-id="2ff3eea36d705c9e39be498d1fa7fc19" data-rm-shortcode-name="rebelmouse-image" />
Jet bursting out of a blazar. Black-hole-powered galaxies called blazars are the most common sources detected by NASA's Fermi Gamma-ray Space Telescope.
NASA
<p>Jon Hakkila likens what they found to skipping stones across the pond. If someone was to throw such a stone into the water towards you, the stone would go through the air in between hops faster than the waves that it causes are moving through the water. As it gets closer, you will see the waves that are produced by each skip in reverse order. The most recently created ones will get to you first and those from the early skips along the water would come last. </p><p style="margin-left: 20px;">"Standard gamma-ray burst models have neglected time-reversible light curve properties," <a href="https://today.cofc.edu/2019/09/23/faster-than-the-speed-of-light-new-research-looks-at-gamma-ray-bursts/" target="_blank">Hakkila explained.</a> "Superluminal jet motion accounts for these properties while retaining a great many standard model features."</p><p>Check out the new paper <a href="https://iopscience.iop.org/article/10.3847/1538-4357/ab3bdf" target="_blank">here</a>, published in <em>The Astrophysical Journal.</em></p>
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Cosmic death beams: Understanding gamma ray bursts
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Study suggests most "dark web" users are not engaging in illicit activities
A new study finds that some people just want privacy.
03 December, 2020
Photo by Soumil Kumar from Pexels
Technology & Innovation
- Despite its reputation as a tool for criminals, only a small percentage of Tor users were actually going to the dark web.
- The rate was higher in free countries and lower in countries with censored internet access.
- The findings are controversial, and may be limited by their methodology to be general assumptions.
<p> Various parts of the internet have earned stereotypes about how people use them. Some of these are warranted, and some are mere caricatures. Perhaps no section of the internet is less pleased with its stereotype than the Tor Network, which must contend with being blamed for every crime that originates on the internet.</p><p> However, a new <a href="https://www.pnas.org/content/early/2020/11/24/2011893117" target="_blank">study</a> shows that the dark web isn't quite as dark as you might think. A group of researchers led by <a href="https://liberalarts.vt.edu/departments-and-schools/department-of-political-science/faculty/eric-jardine.html" target="_blank">Eric Jardine</a> of Virginia Tech suggest that only 6.7 percent of global Tor users are going to sites for what are likely malicious reasons. </p>
What do half of those words mean?
<p> For those who don't spend all of their time on the internet, a few of these terms might be new to you. We'll go over them first before we continue. If you do know all of these terms, you can skip ahead to the next section.<br> <br> <em>Surface Web:</em> The regular internet that you can find with a search engine. You're on it right now; unless these articles are shared in places we don't know about. <br> <br> <em>Deep Web</em>: The part of the internet not indexed by search engines. This includes things like your email inbox; you can't get there from Google or Bing, but instead have to enter a password to find it from another page. You've probably visited the deep web today, too. </p><p><em>Dark Web</em>: A subsection of the deep web that requires special software to access. While not everything there is bad, there are social media sites, email services, hidden forums, and even puzzle games down there; this is also where you would find the places for illegal markets and other, extremely nefarious, things.</p><p> <em>Tor:</em> A kind of software that allows users to browse the internet in near-total anonymity. It does this by encrypting connection data and scrambling the route a computer takes to connect to a site, thus making it difficult, but not impossible, to find who is using a particular website. The potential value of this to criminals should be evident to you. <br> <br> While it often gets bad press for how it can be used for illicit purposes, it should be said it was created and used by the United States government for often banal purposes. The leaders of the Tor Project often remind the public that "normal people" use Tor for everyday internet activities as well.</p><p> As a personal example, I once used it to get around the <a href="https://www.wired.com/1997/06/china-3/" target="_blank">Great Firewall of China</a> when I wanted to get to the regular, uncensored internet.</p>Back to the study
<p> The study observed the final destination of a random selection of Tor users to determine if they went to surface websites or more hidden areas of the internet after connecting to the Tor network. This was done by monitoring the data from entry points in the Tor network, which would allow an observer to where someone was going, but not who.</p><p> Those going to surface websites were assumed just to be using Tor for anonymity and security, while those going into the dark web were presumed more likely to be using it for illegal reasons. <br> </p><p> Despite the popular conception of Tor as a tool for criminals looking to cover their tracks, only 6.7 percent of these users went to sites defined as the dark web, which were themselves not necessarily devoted to illegal <a href="https://www.sciencealert.com/only-a-small-fraction-of-the-dark-web-is-being-used-for-hidden-activity-study-finds" target="_blank" rel="noopener noreferrer">activity</a>. </p><p> The results were further broken down by country, which revealed another layer of information. The authors noted that in countries deemed "not free" by Freedom House, the rate of possible malicious use goes down to 4.8 percent. In countries considered free, the percentage nearly doubles to 7.8 percent.</p>What does this mean for the internet?
<iframe width="730" height="430" src="https://www.youtube.com/embed/MBh7K5ooF2s" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><p> The dark web might be a little lighter than previously suggested. While it is true that there is some horrible stuff down there, this study suggests the people getting to it using the Tor network are mostly using it for legal, and perhaps even banal, purposes. This interpretation is additionally supported by the difference in usage across countries judged free and not free. In those countries with censorship, where a variety of tools must be used to get to sites like Facebook or Wikipedia, the percentage of users going towards locations on the dark web was smaller.</p><p>The authors conclude:</p><p style="margin-left: 20px;"> "The Tor anonymity network can be used for both licit and illicit purposes. Our results provide a clear, if probabilistic, estimation of the extent to which users of Tor engage in either form of activity. Generally, users of Tor in politically 'free' countries are significantly more likely to be using the network in likely illicit ways."</p><p> Additionally, they mention that the Tor network's infrastructure is predominately in free countries, which then see higher rates of its use to reach places that could advance illegal activities. This find may be of interest to policymakers looking to balance the promotion of autonomy and the freedom of information with the goal of preventing crime.</p>What’s the catch?
<iframe width="730" height="430" src="https://www.youtube.com/embed/2UNUMgM9Gwo" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><p> It has been suggested that the internet is the first thing humanity ever created that we don't fully understand. If that is true, it should surprise no one that there are objections to the methods used to study it. <br> <br> The executive director of the Tor Project, Isabela Bagueros, explained their objection to the study's methodology and assumptions to <a href="https://arstechnica.com/gadgets/2020/11/does-tor-provide-more-benefit-or-harm-new-paper-says-it-depends/" target="_blank" rel="noopener noreferrer">Ars Technica</a>:</p><p style="margin-left: 20px;"> <em>"The authors of this research paper have chosen to categorize all .onion sites and all traffic to these sites as "illicit" and all traffic on the "Clear Web" as 'licit.'</em></p><p style="margin-left: 20px;"><em>This assumption is flawed. Many popular websites, tools, and services use onion services to offer privacy and censorship-circumvention benefits to their users. For example, Facebook offers an onion service. Global news organizations, including The New York Times, BBC, Deutsche Welle, Mada Masr, and Buzzfeed, offer onion services.</em></p><p style="margin-left: 20px;"><em>Whistleblowing platforms, filesharing tools, messaging apps, VPNs, browsers, email services, and free software projects also use onion services to offer privacy protections to their users, including Riseup, OnionShare, SecureDrop, GlobaLeaks, ProtonMail, Debian, Mullvad VPN, Ricochet Refresh, Briar, and Qubes OS…...</em></p><p style="margin-left: 20px;"><em>Writing off traffic to these widely-used sites and services as "illicit" is a generalization that demonizes people and organizations who choose technology that allows them to protect their privacy and circumvent censorship. In a world of increasing surveillance capitalism and internet censorship, online privacy is necessary for many of us to exercise our human rights to freely access information, share our ideas, and communicate with one another. Incorrectly identifying all onion service traffic as "illicit" harms the fight to protect encryption and benefits the powers that be that are trying to weaken or entirely outlaw strong privacy technology."</em><br> </p><p>The critique here is justified; there are legitimate websites hidden behind layers of security which were deemed "illicit" by this study's methods. Many people are just trying to protect their anonymity when using them. However, the study's authors based their assumption on previous studies that demonstrate that these hidden sites are used for illegal activities at a higher rate than other parts of the <a href="https://www.cigionline.org/sites/default/files/no20_0.pdf" target="_blank" rel="noopener noreferrer">internet</a>.</p><p>Until a more rigorous and ethically ambiguous method of determining what people using the network are doing on these dark websites is utilized, the findings of studies like this will be general and based on broad assumptions. </p><p>Despite all of this, we can take a few things from this study: most people using Tor to explore the internet aren't using it for evil, those using it in places with limited freedom of information are even less likely to use it for such purposes, and external factors can have significant impacts on how people use a tool such as the internet. <br></p>
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