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Scientists use olive oil to discover new universal physics law
Olive oil leads to the discovery of a law that applies to atoms, superconductors, and even high energy physics.
- Physicists at the Dutch research institute AMOLF used olive oil in an experiment on light phase transitions.
- The scientists found that light would behave the same way in atoms, superconductors, and high energy physics.
- The discovery can lead to applications in new computing and sensing systems.
The dressing in your salad might redefine science if you look carefully enough. Researchers in the Netherlands used a drop of olive oil to discover a new universal law of phase transitions.
The research was carried out by the Interacting Photons group of the AMOLF institute, which focuses on fundamental physics. The experiment involved dropping olive oil into an optical cavity system of photons bouncing back and forth between two mirrors. It was set up to explore how light goes through phase transitions the way it would in boiling water, for example.
What's fascinating, this system had "memory" in how the oil made photons interact with themselves, as the group leader Said Rodriguez explained. "We created a system with memory by placing a drop of olive oil inside the cavity", said Rodriguez. "The oil mediates effective photon-photon interactions, which we can see by measuring the transmission of laser light through this cavity."
The research team, which also included Rodriguez's PhD students Zou Geng and Kevin Peters, increased and decreased the distances between the mirrors at different speeds and noted how light transmitted through the cavity was affected. They saw that the direction in which the mirrors moved influenced how much light got through the cavity, finding that "the transmission of light through the cavity is non-linear." This behavior of light, called hysteresis, is present in the phase transitions of boiling water or magnetic materials.
The scientists also increased the speed with which the oil-filled cavity opened and closed, observing that under such conditions the hysteresis was not always present. This allowed them to extrapolate a universal law. "The equations that describe how light behaves in our oil-filled cavity are similar to those describing collections of atoms, superconductors and even high energy physics," elaborated Rodriguez, adding: "Therefore, the universal behavior we discovered is likely to be observed in such systems as well."
An optical cavity formed by two mirrors used in the experiment. Light going through the cavity bounces between the mirrors until leaving to where the transmission is measured. The scientists filled this cavity with olive oil and moved the mirrors at varying speeds.
Credit: Henk-Jan Boluijt (AMOLF)
The researchers think their discovery may have potential applications in computing or sensing systems.
Check out their new study in Physical Review Letters.
A mind-blowing explanation of the speed of light
‘Designer baby’ book trilogy explores the moral dilemmas humans may soon create
How would the ability to genetically customize children change society? Sci-fi author Eugene Clark explores the future on our horizon in Volume I of the "Genetic Pressure" series.
18 January, 2021
Surprising Science
- A new sci-fi book series called "Genetic Pressure" explores the scientific and moral implications of a world with a burgeoning designer baby industry.
- It's currently illegal to implant genetically edited human embryos in most nations, but designer babies may someday become widespread.
- While gene-editing technology could help humans eliminate genetic diseases, some in the scientific community fear it may also usher in a new era of eugenics.
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<div class="amazon-assets-widget__title" style="display: block;">Genetic Pressure Volume I: Baby Steps</div>
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<p>Imagine it's 2045. You start hearing rumors from your well-heeled friends about a mysterious corporation based on an undisclosed island that's offering an unprecedented service: the ability to genetically design your baby.</p><p>The baby will have some of your genetics, and some genetics from a sperm or egg donor, selected by you. But the rest of your child's genetic profile will be engineered by science. These changes will make it impossible for your child to develop genetic diseases. They'll also allow you to customize your child for dozens of traits, including intelligence level, emotional disposition, sexual orientation, height, skin tone, hair color, and eye color, to name a few. </p><p>This raises unsettling philosophical questions for some customers. "When does my child stop being my child?" they ask the corporate representatives. These wary customers are reminded of how risky it is to reproduce the old-fashioned way. The Better Genetics Corporation's motto sums it up: "Only God plays dice—humans don't have to."</p><p>This is the world described in a new science-fiction series by Eugene Clark titled <a href="http://bigth.ink/38VhJn3" target="_blank" rel="noopener noreferrer">"Genetic Pressure"</a>, which explores the moral and scientific implications of a future in which designer babies are becoming a major industry. The first book begins with the story of Rachel, a renowned horse breeder who befriends a billionaire client, and soon gets the funding to visit the tropical island on which the Better Genetics Corporation is headquartered. </p><p>There, corporate executives walk her through the process of designing a baby—an experience that feels like an uncanny mix between visiting a doctor and designing a luxury car. The series is told from multiple perspectives, serving as a deep dive into a complex moral web that today's scientists may already be weaving.</p>
<blockquote>[T]he introduction of designer babies would create a labyrinth of philosophical dilemmas that society is only beginning to explore. </blockquote>
<p>Case in point: In 2018, Chinese scientist He Jiankui announced that he had helped create the world's first genetically engineered babies. Using the gene-editing tool CRISPR on embryos, He Jiankui modified a gene called <a href="https://ghr.nlm.nih.gov/gene/CCR5" target="_blank">CCR5</a>, which enables HIV to enter and infect immune system cells. His goal was to engineer children that were immune to the virus.</p><p>It's unclear whether he succeeded. But what's certain is that the experiment shocked the international scientific community, which generally agreed that it's unethical to conduct gene-editing procedures on humans, given that scientists don't yet fully understand the consequences.</p><p>"This experiment is monstrous," Julian Savulescu, a professor of practical ethics at the University of Oxford, told <a href="https://www.theguardian.com/science/2018/nov/26/worlds-first-gene-edited-babies-created-in-china-claims-scientist" target="_blank"><em>The Guardian</em></a>. "The embryos were healthy. No known diseases. Gene editing itself is experimental and is still associated with off-target mutations, capable of causing genetic problems early and later in life, including the development of cancer."</p><p>Importantly, He Jiankui wasn't treating a disease, but rather genetically engineering babies to prevent the future contraction of a virus. These kinds of changes are heritable, meaning the experiment could have major downstream effects on future generations. So, too, would a designer-baby industry, even if scientists can do it safely.</p><p>With major implications on inequality, discrimination, sexuality, and our conceptions of life, the introduction of designer babies would create a labyrinth of philosophical dilemmas that society is only beginning to explore. </p>
<a href="http://bigth.ink/38VhJn3" ><img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNTI2MTEzNi9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0NDcxMzY4M30.5fwCPH_6sQ0RF19aAH4FQFue9HFJykzdEc0Xka1TY04/img.jpg?width=980" id="affdd" class="rm-shortcode" data-rm-shortcode-id="76374e8775bd9441a338cf513bb1fa55" data-rm-shortcode-name="rebelmouse-image" data-width="924" data-height="520" /></a>
Tribalism and discrimination
<p>One question the "Genetic Pressure" series explores: What would tribalism and discrimination look like in a world with designer babies? As designer babies grow up, they could be noticeably different from other people, potentially being smarter, more attractive and healthier. This could breed resentment between the groups—as it does in the series.</p><p>"[Designer babies] slowly find that 'everyone else,' and even their own parents, becomes less and less tolerable," author Eugene Clark told Big Think. "Meanwhile, everyone else slowly feels threatened by the designer babies."</p><p>For example, one character in the series who was born a designer baby faces discrimination and harassment from "normal people"—they call her "soulless" and say she was "made in a factory," a "consumer product." </p><p>Would such divisions emerge in the real world? The answer may depend on who's able to afford designer baby services. If it's only the ultra-wealthy, then it's easy to imagine how being a designer baby could be seen by society as a kind of hyper-privilege, which designer babies would have to reckon with. </p><p>Even if people from all socioeconomic backgrounds can someday afford designer babies, people born designer babies may struggle with tough existential questions: Can they ever take full credit for things they achieve, or were they born with an unfair advantage? To what extent should they spend their lives helping the less fortunate? </p>Sexuality dilemmas
<p>Sexuality presents another set of thorny questions. If a designer baby industry someday allows people to optimize humans for attractiveness, designer babies could grow up to find themselves surrounded by ultra-attractive people. That may not sound like a big problem.</p><p>But consider that, if designer babies someday become the standard way to have children, there'd necessarily be a years-long gap in which only some people are having designer babies. Meanwhile, the rest of society would be having children the old-fashioned way. So, in terms of attractiveness, society could see increasingly apparent disparities in physical appearances between the two groups. "Normal people" could begin to seem increasingly ugly.</p><p>But ultra-attractive people who were born designer babies could face problems, too. One could be the loss of body image. </p><p>When designer babies grow up in the "Genetic Pressure" series, men look like all the other men, and women look like all the other women. This homogeneity of physical appearance occurs because parents of designer babies start following trends, all choosing similar traits for their children: tall, athletic build, olive skin, etc. </p><p>Sure, facial traits remain relatively unique, but everyone's more or less equally attractive. And this causes strange changes to sexual preferences.</p><p>"In a society of sexual equals, they start looking for other differentiators," he said, noting that violet-colored eyes become a rare trait that genetically engineered humans find especially attractive in the series.</p><p>But what about sexual relationships between genetically engineered humans and "normal" people? In the "Genetic Pressure" series, many "normal" people want to have kids with (or at least have sex with) genetically engineered humans. But a minority of engineered humans oppose breeding with "normal" people, and this leads to an ideology that considers engineered humans to be racially supreme. </p>Regulating designer babies
<p>On a policy level, there are many open questions about how governments might legislate a world with designer babies. But it's not totally new territory, considering the West's dark history of eugenics experiments.</p><p>In the 20th century, the U.S. conducted multiple eugenics programs, including immigration restrictions based on genetic inferiority and forced sterilizations. In 1927, for example, the Supreme Court ruled that forcibly sterilizing the mentally handicapped didn't violate the Constitution. Supreme Court Justice Oliver Wendall Holmes wrote, "… three generations of imbeciles are enough." </p><p>After the Holocaust, eugenics programs became increasingly taboo and regulated in the U.S. (though some states continued forced sterilizations <a href="https://www.uvm.edu/~lkaelber/eugenics/" target="_blank">into the 1970s</a>). In recent years, some policymakers and scientists have expressed concerns about how gene-editing technologies could reanimate the eugenics nightmares of the 20th century. </p><p>Currently, the U.S. doesn't explicitly ban human germline genetic editing on the federal level, but a combination of laws effectively render it <a href="https://academic.oup.com/jlb/advance-article/doi/10.1093/jlb/lsaa006/5841599#204481018" target="_blank" rel="noopener noreferrer">illegal to implant a genetically modified embryo</a>. Part of the reason is that scientists still aren't sure of the unintended consequences of new gene-editing technologies. </p><p>But there are also concerns that these technologies could usher in a new era of eugenics. After all, the function of a designer baby industry, like the one in the "Genetic Pressure" series, wouldn't necessarily be limited to eliminating genetic diseases; it could also work to increase the occurrence of "desirable" traits. </p><p>If the industry did that, it'd effectively signal that the <em>opposites of those traits are undesirable. </em>As the International Bioethics Committee <a href="https://academic.oup.com/jlb/advance-article/doi/10.1093/jlb/lsaa006/5841599#204481018" target="_blank" rel="noopener noreferrer">wrote</a>, this would "jeopardize the inherent and therefore equal dignity of all human beings and renew eugenics, disguised as the fulfillment of the wish for a better, improved life."</p><p><em>"Genetic Pressure Volume I: Baby Steps"</em><em> by Eugene Clark is <a href="http://bigth.ink/38VhJn3" target="_blank">available now.</a></em></p>
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Octopus-like creatures inhabit Jupiter’s moon, claims space scientist
A leading British space scientist thinks there is life under the ice sheets of Europa.
03 May, 2020
Jupiter's moon Europa has a huge ocean beneath its sheets of ice.
Credit: NASA/JPL-Caltech/SETI Institute
Surprising Science
- A British scientist named Professor Monica Grady recently came out in support of extraterrestrial life on Europa.
- Europa, the sixth largest moon in the solar system, may have favorable conditions for life under its miles of ice.
- The moon is one of Jupiter's 79.
<p>Alien hunting is a hopeful activity and one reason behind our space programs that the public generally supports. Looking for other life is a strong incentive to be venturing out into space, despite having found none so far. A top British space scientist,<strong> Professor Monica Grady,</strong> gave all cosmic explorers a big dose of such hope in a recent speech. She is certain there's some form of life on Jupiter's moon, <strong>Europa</strong>.</p><p>This life would not look human, but more like an "octopus," and is likely residing in the cold waters under the moon's sheets of ice. </p><p>Grady, a Professor of Planetary and Space Science and Chancellor at Liverpool Hope University, thinks there's a great likelihood of undiscovered life somewhere in our galaxy.</p><p>She also supposes that the deeper caves and cavernous spaces of Mars could be harboring some subterranean creatures, likely bacteria, there to escape the solar radiation. They could be getting water from the ice buried deep down. </p><p style="margin-left: 20px;">"When it comes to the prospects of life beyond Earth, it's <strong>almost a racing certainty </strong>that there's life beneath the ice on Europa," <a href="https://phys.org/news/2020-02-certainty-life-europa-mars-uk.html" target="_blank">she said</a> in a February address.</p>
<p><span style="background-color: initial;">She thinks these life forms on Europa, </span><span style="background-color: initial;">390 million miles from Earth, could be higher in sophistication than the Martian bacteria, possibly having "the intelligence of an octopus."</span><br></p><p>Where would the creatures live on this moon of Jupiter? Somewhere below the very thick layer of ice, which goes 15 miles deep in some places. It's possible there is liquid water beneath all that ice, keeping whatever lives inside protected against radiation and the impact of asteroids and similar smashing bodies.</p><p><span></span><span style="background-color: initial;">The likelihood of life on Europa is bolstered by </span><span style="background-color: initial;">the possible <a href="https://ui.adsabs.harvard.edu/abs/2011AGUFM.P23D1743G/abstract" target="_blank">hydrothermal vents</a> on its ocean floor. Such vents are cradles of life on Earth.</span></p><p>Grady thinks that our solar system doesn't have to be particularly special and that statistically speaking, as we explore other stars and galaxies, we should be able to find conditions for life. "I think it's highly likely there will be life elsewhere—and I think it's highly likely they'll be made of the same elements," <a href="https://phys.org/news/2020-02-certainty-life-europa-mars-uk.html" target="_blank">stated</a> the professor.</p>
Neil deGrasse Tyson wants to go ice fishing on Europa
<div class="rm-shortcode" data-media_id="GLGsRX7e" data-player_id="FvQKszTI" data-rm-shortcode-id="f4790eb8f0515e036b24c4195299df28"> <div id="botr_GLGsRX7e_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/GLGsRX7e-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/GLGsRX7e-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/GLGsRX7e-FvQKszTI.js"></script> </div><p>Grady did not want to guess whether we would contact extraterrestrials any time soon, citing the fact that distances between us and likely aliens might be gigantic. </p><p>On the other hand, she added, if you look at a grain of sand, you "can see that most of it is made up of silicates, but it's also got little patches of carbon in it—and that carbon is extra-terrestrial, because it also contains nitrogen and hydrogen, which is not a terrestrial signature."</p><p>This tiny sample, says Grady, shows it was hit by meteorites, asteroids, and interstellar dust, pointing out "It's giving us an idea of how complex the record of extra-terrestrial material really is."</p>
<p>As for Europa, it has certainly figured in conversations about alien life previously. As <a href="https://europa.nasa.gov/mission/why-europa/" target="_blank">NASA explains</a>, scientists call Europa an "ocean world" due to decades of observations that predict an ocean under its sheets of ice. </p><p><span style="background-color: initial;">In 2019, water vapor was confirmed there by NASA for the first time. While it might just have the right conditions for life, </span><span style="background-color: initial;">does this moon have little octopus E.T.s swimming about? Future studies will tell. </span></p>
Water Vapor Above Europa’s Surface Deteced for First Time
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What is the ‘self’? The 3 layers of your identity.
Answering the question of who you are is not an easy task. Let's unpack what culture, philosophy, and neuroscience have to say.
22 January, 2021
Videos
- Who am I? It's a question that humans have grappled with since the dawn of time, and most of us are no closer to an answer.
- Trying to pin down what makes you you depends on which school of thought you prescribe to. Some argue that the self is an illusion, while others believe that finding one's "true self" is about sincerity and authenticity.
- In this video, author Gish Jen, Harvard professor Michael Puett, psychotherapist Mark Epstein, and neuroscientist Sam Harris discuss three layers of the self, looking through the lens of culture, philosophy, and neuroscience.
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Discovery of two giant radio galaxies hints at more to come
The newly discovered galaxies are 62x bigger than the Milky Way.
21 January, 2021
This image shows most of the giant radio galaxy MGTC J095959.63+024608.6; in red is the radio light from the giant radio galaxy, as seen by MeerKAT. It is placed ontop of a typical image of the night sky.
I. Heywood, University of Oxford / Rhodes University / South African Radio Astronomy Observatory / CC BY 4.0.
Surprising Science
- Two recently discovered radio galaxies are among the largest objects in the cosmos.
- The discovery implies that radio galaxies are more common than previously thought.
- The discovery was made while creating a radio map of the sky with a small part of a new radio array.
The universe is vast, and a lot of the stuff in it is massive. In a new <a href="https://academic.oup.com/mnras/article/501/3/3833/6034001" rel="noopener noreferrer" target="_blank">study</a> published in Monthly Notices of the Royal Astronomical Society, researchers have added to the list of nearly unfathomably large objects with two giant radio galaxies, each much, much larger than the Milky Way galaxy we call home. <p class=""><br></p>
An extremely active galaxy
<p> <br> </p><p>Radio galaxies are galaxies with extremely active central regions, known as nuclei, which shine incredibly brightly in some part of the electromagnetic spectrum. They are known for emitting large jets of ionized matter into intergalactic space at speeds approaching that of light. They are related to quasars and blazars. It is thought that supermassive black holes are the energy source that make these galaxies shine so brightly. </p><p>What makes these two galaxies (known as MGTC J095959.63+024608.6 and MGTC J100016.84+015133.0) so interesting is their size. Only 831 similar, "giant radio galaxies" are known to exist. As study co-author Dr. Matthew Prescott explains, these are particularly large even for <a href="https://www.forbes.com/sites/jamiecartereurope/2021/01/18/we-just-found-two-mysterious-galaxies-62-times-bigger-than-our-milky-way-say-scientists/?sh=76edf29c2892" target="_blank" rel="noopener noreferrer">giants</a>:</p><p>"These two galaxies are special because they are amongst the largest giants known, and in the top 10 percent of all giant radio galaxies. They are more than two mega-parsecs across, which is around 6.5 million light-years or about 62 times the size of the Milky Way. Yet they are fainter than others of the same size."</p><p>The smaller of the two is just over two megaparsecs across, roughly six and a half million light-years. The larger is almost another half megaparsec larger than <a href="http://www.sci-news.com/astronomy/giant-radio-galaxies-09266.html" target="_blank">that</a>. <br></p><p>Exactly how these things get to be so massive remains a mystery. Some have proposed that they are ejecting matter into unusually empty space, allowing for the jet to expand further, though some evidence contradicts this. The most commonly suggested idea is that they are simply much, much older than the previously observed radio galaxies, allowing more time for expansion to occur.</p>How does this change our understanding of the universe?
<p> While exciting and impressive on their own, the findings also suggest that there are very many more of these giant galaxies than previously supposed. If you were going off the previous estimates for how typical these galaxies are, then the odds of finding these two would be 1 in 2.7×10<sup>6. </sup>This suggests that there must be more, given that the alternative is that the scientists were impossibly lucky. </p><p> In the study, the researchers also apply this reasoning to smaller versions of these galaxies, saying:</p><p> "While our analysis has considered only enormous (>2 Mpc) objects, if radio galaxies must grow to reach this size, then we may expect to similarly uncover in our data previously undetected GRGs with smaller sizes."</p><p> Exactly how common radio galaxies and turn out to be remains to be seen. Still, it will undoubtedly be an exciting time for radio astronomy as new telescopes are turned skywards to search for them.</p>How did they find them?
<iframe width="730" height="430" src="https://www.youtube.com/embed/c1ZW3nVfe5A" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><p> The new galaxies were discovered by the amusingly named <a href="https://www.sarao.ac.za/gallery/meerkat/" target="_blank" rel="noopener noreferrer">MeerKAT</a> radio telescope in South Africa during the creation of a new radio map of the sky. The MeerKAT is the first of what will soon be the <a href="https://en.wikipedia.org/wiki/Square_Kilometre_Array" target="_blank" rel="noopener noreferrer">Square Kilometre Array</a> of telescopes, which will span several countries in the southern hemisphere and make even more impressive discoveries in radio astronomy possible. </p>
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Mind & Brain
The secret life of maladaptive daydreaming
Daydreaming can be a pleasant pastime, but people who suffer from maladaptive daydreamers are trapped by their fantasies.
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