More stories

  • in

    An X-ray glow suggests black holes or neutron stars fuel weird cosmic ‘cows’

    A brilliant blast from a galaxy 2 billion light-years away is the brightest cosmic “Cow” found yet. It’s the fifth known object in this new class of exploding stars and their long-glowing remnants, and it’s giving astronomers even more hints of what powers these mysterious blasts.

    These Cow-like events, named for the first such object discovered in 2018 — which had the unique identifier name of AT2018cow — are a subclass of supernova explosions, making up only 0.1 percent of such cosmic blasts (SN: 6/21/19). They brighten quickly, glow brilliantly in ultraviolet and blue light and continue to show up for months in higher-energy X-rays and lower-energy radio waves.

    X-rays from the newest discovery, dubbed AT2020mrf, glowed 20 times as bright as the original Cow a month after the blast, Caltech astronomer Yuhan Yao reported January 10 at a virtual news conference held by the American Astronomical Society. And even one year after this new object’s discovery, its X-rays were 200 times as bright as those from the original Cow. Yao and colleagues also reported the results in a paper submitted December 1 at arXiv.org.

    Unraveling all that took a bit of time. The Zwicky Transient Facility at Caltech’s Palomar Observatory near San Diego, Calif., initially noted a bright new burst of light June 12, 2020, but astronomers didn’t realize what it was at the time.

    Sign Up For the Latest from Science News

    Headlines and summaries of the latest Science News articles, delivered to your inbox

    Thank you for signing up!

    There was a problem signing you up.

    Then in April 2021, researchers with the Spektrum-Roentgen-Gamma (SRG) space telescope, which studies X-ray light, alerted Yao and her colleagues to an interesting signal in SRG data from July 21–24, 2020, at the same spot in the sky. “I almost immediately realized that this might be another Cow-like event,” says Yao. The astronomers sprang to action and looked at that location with multiple other observatories in different kinds of light.

    One of those observatories was the space-based Chandra X-ray Observatory, the world’s most powerful X-ray telescope. In June 2021, a year after the original supernova blast, it captured X-rays from the same location. The source’s signal “was 10 times brighter than what I expected,” says Yao, and 200 times as bright as the original Cow was a year post-explosion.

    Even more exciting was that the strengths of both the Chandra X-ray detection and the original SRG X-ray observations also changed within hours to days. That flaring characteristic, it turns out, can tell astronomers a lot.

    “X-rays give us information of what’s happening at the heart of these events,” says MIT astrophysicist DJ Pasham, who has studied the original Cow but was not part of this new study. “The duration of the flare gives you a sense of how compact or how big the object is.”  

    A compact object like an actively eating black hole or a rapidly spinning and highly magnetic neutron star would create the strong and variable X-ray signals that were seen, Yao says. These were the two most probable leftover remnants of the original cosmic Cow as well, but the AT2020mrf observations provide even greater certainty (SN: 12/13/21).

    Further observations and catching these objects earlier in the act with multiple types of light will help researchers learn more about this new class of supernovas and what type of star eventually explodes as a Cow. More

  • in

    Otherlands review: A fascinating journey through Earth's history

    By Gege Li

    An artist’s impression of how Earth’s first multicellular animals looked on the sea floorMark Garlick/Science Photo Library
    Book
    Otherlands: A world in the making
    Thomas HallidayAdvertisement

    OUR planet has existed for some 4.5 billion years In that time, it has undergone extraordinary changes, with landscapes and life forms that would seem almost alien to us today. Yet clues to their existence and fate can be found buried deep within Earth’s layers.
    Otherlands by palaeobiologist Thomas Halliday provides a unique portrait of these strange and remarkable environments and the species that inhabited them. Through rich, detailed descriptions of ancient organisms and geological processes that draw on the fossil record and his own imagination, Halliday transports us back through deep time, from the relatively recent – tens of thousands of years ago – to when complex life first emerged in the Ediacaran period hundreds of millions of years ago.
    Each chapter spans a geological time period, focusing on a specific part of the world that stands out either for the quality of the fossil evidence or a notable event.
    Halliday is careful to not only give attention to charismatic animals like dinosaurs and woolly mammoths, but also to plants, land masses and oceans, using the latest research to back up his conclusions.
    In one chapter, we discover that giant penguins flourished in the then-rainforests of Antarctica during the Eocene. In another, how Jurassic seas in what is now Germany contained vast tropical reefs built by glass sponges that looked like “frozen lace”, as marine pterosaurs soared in the skies overhead. We also see how, during the Devonian period, Scotland was home to metres-high fungi that would have resembled “half-melted grey snowmen”.
    As well as painting an intricate picture of the worlds that once existed, Halliday also highlights the fleeting existence of humanity. Our ancestors make the briefest splash onto the scene in the Pliocene around 4 million years ago, when early hominins appeared in the fossil record in what is now Kanapoi in Kenya.
    If Earth’s history were squeezed into a single day, written human history would make up the last 2 thousandths of a second, Halliday points out. And yet “our species has an influence unlike almost any other biological force”. It is also far more destructive than the prominent natural disasters of the past.
    Here, the book carries a clear message: that we must do something about the urgent climate situation we find ourselves in and the coming human-induced mass extinction. This, he argues, warrants a meticulous look back through Earth’s palaeontological record to understand how things might turn out in the future, and how we might take control of them.
    This message is, by now, one we are used to hearing. For me, the most distinctive feature of the book is the way that Halliday chooses to describe the past. He encourages us to treat his writings like “a naturalist’s travel book, albeit one of lands distant in time rather than space”. This provides a sense of adventure and exploration where we see “short willows write wordless calligraphy in the wind” 20,000 years ago, or walk across “centuries-old mattresses of conifer needles” 41 million years ago.
    It is refreshing to come across a book on palaeontology and geology that doesn’t just state what we know and why. Instead, Halliday uses scientific information to provide insights into worlds long gone. He is appropriately lavish in his depiction of the variety and resilience of life, without compromising on scientific accuracy.
    To read Otherlands is to marvel not only at these unfamiliar lands and creatures, but also that we have the science to bring them to life in such vivid detail.

    More on these topics: More

  • in

    Don't miss: Sci-fi The Orbital Children on Netflix

    Read
    The Weaponisation of Everything explores how old-style warfare has been replaced by disinformation, espionage, crime and subversion. According to security expert Mark Galeotti, this may turn out to be a good thing.

    NETFLIXAdvertisement
    Watch
    The Orbital Children is a dizzying sci-fi anime series set in a future where AI has given people the freedom to travel through space. When a group of children get stranded on a space station they must fight to survive. On Netflix from 28 January.
    Bassam Al-Sabah, I AM ERROR, 2021. Video HD, 28 min. Film still. Commissioned by Gasworks
    Visit
    I Am Error at the De La Warr Pavilion in Bexhill-on-Sea, UK, sees artist Bassam Al-Sabah weave together video, painting and sculpture to explore how masculinity is represented in computer games. From 30 January.

    More on these topics: More

  • in

    Station Eleven review: An uplifting vision of a post-pandemic world

    By Elle Hunt

    Kirsten and her close friend August stick together to surviveHBO Max/Warner Media
    TV
    Station Eleven
    Created by Patrick SomervilleAdvertisement

    EARLY in the covid-19 pandemic, as people struggled to make sense of the unfolding global crisis, many turned to stories almost as often as the latest news and science.
    In January 2020, Steven Soderbergh’s Contagion entered the top 10 of the UK iTunes movie rental charts nearly a decade after its release. And much to the bemusement of its author, Emily St John Mandel, the 2014 dystopian novel Station Eleven – in which the “Georgia flu” kills most of the world’s population – suddenly gained a new audience. “I don’t know who in their right mind would want to read Station Eleven during a pandemic,” Mandel said at the time.
    The book has since been adapted into a 10-part miniseries by screenwriter Patrick Somerville, who also wrote for The Leftovers, another critically acclaimed drama about the collapse of civilisation. His adaptation of Station Eleven was released to rave reviews in the US and Australia.
    Station Eleven follows Kirsten (Mackenzie Davis), first as a child actor (Matilda Lawler) orphaned by the Georgia flu in present-day Chicago and then 20 years in the future, where she makes a living as a roving performer in a theatre troupe called the Travelling Symphony. She and her friends tour the settlements of the Great Lakes performing music and Shakespeare plays to survivors, lifting their spirits and sharing their motto (originally from Star Trek: Voyager): “Survival is insufficient”.
    These two timelines, year zero and year 20, blur and merge with Kirsten’s fears for the future and recollections of her traumatic past, both of which intrude on her present. In particular, her thoughts return to Jeevan (Himesh Patel) and his brother Frank (Nabhaan Rizwan), who took her in during the first weeks of the pandemic. Kirsten also repeatedly returns to a graphic novel, called Station Eleven, which she clung to as a child, and which takes on totemic importance in the post-pandemic world.
    “The episodes in year zero show a world unsettlingly like 2020, with cities emptied and aircraft grounded”
    Most of the characters we meet have some connection to the graphic novel and, in the series, its spaceman protagonist Doctor Eleven takes on a comforting presence, watching over Kirsten and her friends like a sort of benevolent god. The connections between characters are gradually revealed as the series slides back and forth in time. Miranda (Danielle Deadwyler) is the author and illustrator of the graphic novel, while her ex-husband Arthur (Gael García Bernal) is a movie star who was acting alongside young Kirsten in King Lear in the “before”. He dies on stage from Georgia flu.
    Though the pandemic of the TV show is a near-extinction event, the episodes set in year zero show a world unsettlingly like 2020, with supermarket shelves stripped bare, cities emptied and aircraft grounded. It also captures the lockdown surge in creativity as Kirsten, Jeevan and Frank find purpose and unity in making music and plays as the end of the world unfolds around them.
    By year 20, the parallels with our covid-19 pandemic are minimal. There is even a generation of “post-pans”: 20-somethings who never saw the world as we know it and who press Kirsten for stories of smartphones and Uber as if they were fairy tales. They weren’t that great, she reassures them.
    Not everyone is at peace in the post-pandemic world, as Kirsten and her friends discover with often devastating results. However, without shying away from confronting the turmoil and trauma of massive societal change, Station Eleven paints a surprisingly uplifting picture of the future, showing how civilisation might be rebuilt with art and community at its centre. It is a comforting vision as we ease into year three of living with covid-19.
    Mandel recently said she felt “profoundly uncomfortable” that her novel dealing with a fictional pandemic was being boosted by a real-world life-or-death one. But as these uncertain times continue, Station Eleven‘s vision of the future – where humanity endures, and beauty is cherished – is a reassuring one to share in.

    More on these topics: More

  • in

    Is Pluto a planet? The Spanish government's tax portal says it is

    Josie Ford
    Guess the planet
    Feedback has always been mildly sceptical of, not to say narked by, requests to click on pictures of bicycles and fire hydrants to prove we aren’t a robot. True, no one has ever seen an algorithm riding a bicycle, but when the shape-shifting terminator bots finally arrive, they will probably take on innocent forms such as fire hydrants. It might take one to know one.
    At least they won’t be able to get social security benefits in Spain. Genís Cardona from Solsona, Catalonia, reports accessing an official Spanish government portal for tax and welfare services and being requested to answer a quiz question: “Which of the following is a planet? A. Banana; B. Pluto; C. Scissors; D. Bee”.
    A decade and a half on, Pluto’s controversial demotion from planethood clearly still rankles in some quarters. Like Genís, we appreciate the spirit of this open defiance of the International Astronomical Union’s edicts. Come to think of it, though, does anyone know which side the robots are on?Advertisement
    Flipping bird
    Our mention of “New Zealand’s most annoying tūī” (1 January) prompts Matthew Arozian to write from Baltimore, Maryland, with the heartfelt insight that the Carolina wren – Thryothorus ludovicianus, we savour on our tongue – weighs approximately 18 to 22 grams yet produces calls that can reach 110 decibels.
    He asks us to imagine the cacophonous circus of a brood being taught to fly just outside his home-office window. We close our eyes, rapidly open them again and sympathise. Mind you, the transcendent benefits for our well-being of being within and bonded to nature are well known, Matthew. Call it home delivery.
    Polly the pickled parrot
    Staying with our feathered frenemies, our Australasia correspondent Alice Klein provides an addendum to our item last week about alcoholic overindulgence in the animal kingdom with the story of Broome Veterinary Hospital in Kimberley, Australia, which ABC News reported in December was treating a spate of red-winged parrots apparently boozed up on fermenting mangoes.
    As Michael Considine, a biologist at the University of Western Australia, pointed out, volatile compounds released by the fermentation of fallen mangoes attract the birds, encouraging them to propagate the plant’s seeds – even if, by whumping into windows, falling over and generally sitting around dazed and vulnerable to predators, the parrots’ own chances of survival aren’t exactly enhanced.
    Evolution in the raw, and a reminder to the rest of us not to drink and fly.
    Can’t find the words
    The Guardian reports rage and distress at copycat app versions of the online word game Wordle that assault the original’s innocent ethos of freedom from both charge and data hoovering. For those who haven’t yet fallen down this rabbit hole, Wordle confronts its players with a blank series of five letters to fill in, giving them six attempts to arrive at the actual five-letter word that the computer was thinking of, once told whether their letters appear in that word.
    As Fields medal-winning mathematician Tim Gowers has highlighted, this gamifies entropy in an information theory sense, as the information required to specify a given object. This makes it Solid Science, but Feedback has now fallen down the rabbit hole at the bottom of the rabbit hole with Sweardle, a game that does the same thing with a more limited set of four-letter words, and Letterle, which gives a maximum of 26 goes to guess a single letter. We know all of this is contributing to the heat death of the universe, but we can’t stop now.
    Tin lid on it
    Of which, many thanks to those of you who wrote in varying degrees of delight and distress over our fiendishly difficult holiday word search featuring the names of all the known fundamental particles, the chemical elements and the amino acids that make up life’s proteins (18/25 December 2021, p 43). We are treating it as a slow-burning abvent calendar – a term we just invented, and we expect letters about – finding one a day as Christmas recedes.
    For those of you whose year is off to an even slower start, we forward Bob Ladd’s query, which we take as expressing both delight and distress, asking how you might design the same word search with no accidental instances of TIN – apart from those required in TIN and ASTATINE, say. That sounds like a case for the entropy theory of information to us. And in response to Mike Clark’s query, we don’t know whether it is SULPHUR or SULFUR yet, either.
    Whale units
    Still in holiday mode, Harry Lagoussis writes from Athens concerning our statement that a lump of ambergris, or ancient whale poo, the size of a human head “could fetch you £50,000 or more” (18/25 December 2021, p 56).
    “Does that make the ‘shithead’ the standard unit of ambergris volume? And, perhaps more importantly, if 1 shithead = £50,000, does that justify the use of the selfsame unit when discussing the global financial system, celebrity net worth etc.?” he asks. At a punt, it’s no and no, but we will ask our ever-vigilant subeditors. And with that, we tiptoe out of the room.
    Got a story for Feedback?
    Send it to feedback@newscientist.com or New Scientist, Northcliffe House, 2 Derry Street, London W8 5TTConsideration of items sent in the post will be delayed
    You can send stories to Feedback by email at feedback@newscientist.com. Please include your home address. This week’s and past Feedbacks can be seen on our website. More

  • in

    What really makes people happy – and can you learn to be happier?

    Our life satisfaction is shaped by many things including our genes and relative wealth, but there is now good evidence that you can boost your basic happiness with these key psychological strategies

    Humans

    19 January 2022

    By David Robson
    Tara Moore/Getty Images; Matt Dartford
    WHAT MAKES PEOPLE HAPPY?
    You probably know the type: those Pollyannas who seem to have a relentlessly sunny disposition. Are they simply born happy? Is it the product of their environment? Or does it come from their life decisions?
    If you are familiar with genetics research, you will have guessed that it is a combination of all three. A 2018 study of 1516 Norwegian twins suggests that around 30 per cent of the variance in people’s life satisfaction is inherited. Much of this seems to be related to personality traits, such as neuroticism, which can leave people more vulnerable to anxiety and depression, and extraversion, which encourages more gregarious behaviour. Both traits are known to be influenced by a range of genes.
    To put this in context, the heritability of IQ is thought to hover around 80 per cent, so environmental factors clearly play a role in our happiness. These include our physical health, the size and strength of our social network, job opportunities and income. The effect of income, in particular, is nuanced: it seems that the absolute value of our salary matters less than whether we feel richer than those around us, which may explain why the level of inequality predicts happiness better than GDP.
    Interestingly, many important life choices have only a fleeting influence on our happiness. Consider marriage. A 2019 study found that, on average, life satisfaction does rise after the wedding, but the feeling of married bliss tends to fade over middle age. Needless to say, this depends on the quality of the relationship: marriage’s impact on well-being is about twice as large … More

  • in

    How to perfectly pickle your cucumbers

    By Sam Wong
    StockFood/Scherer, Jim
    ALL over the world, people use acid to preserve fruit and vegetables, creating the sour and delicious foods we call pickles. The microbes that spoil our food have a hard time growing if the pH is lower than 4.5, but we can eat foods with a pH as low as 2 (the lower the pH, the more acidic the substance).
    Some pickles are made by salting vegetables or fruit, encouraging the growth of bacteria that produce lactic acid. These include kimchi, which I described in a previous issue (29 February 2020). A quicker and simpler way to make … More

  • in

    Science is increasingly revealing how we can boost our happiness

    Kseniia Zagrebaeva
    “Life, Liberty and the pursuit of Happiness.” These are three unalienable rights emphasised by the US Declaration of Independence as being the duty of their leaders to protect and secure.
    The third one gives perhaps most pause for thought. What should governments – and all of us – be doing to maximise societal and personal happiness? Indeed, what even defines happiness?
    Politicans and philosophers have wrangled over the apparent contradictions and conflicts that such questions throw up for centuries. Meanwhile, a simple equivalence has come to be made across the world. Many believe that happiness comes with having a bigger cake and … More