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Kunt U Eten Geverfde Paaseieren? – Gekleurd Ei Voedselveiligheid Tips

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  • Een food safety expert en diëtiste uitleggen waarom het meestal niet veilig om te eten geverfde paaseieren.
  • Het risico heeft minder te maken met de kleurstof zelf (zolang de food-safe), en meer te maken met de hoeveelheid tijd die de eieren zijn weggelaten bij kamertemperatuur.

    Het verven van de eieren is een Paas-traditie, en het proces is eenvoudig. U koopt een ei-verven kit, komen met een aantal creatieve kijkt, en vervolgens weer van je mooie creaties.

    Maar er is een grote vraag die vaak terugkomt in de nasleep: Kan je eten geverfde paaseieren? Immers, ze eten en ze beschikbaar zijn. Maar… aan de andere kant, je hebt gewoon kleurstof. Dus wat is de deal?

    Kunt u eten geverfde paaseieren?

    In de meeste gevallen, je niet mag eten geverfde paaseieren, en het is waarschijnlijk niet de reden zou je denken. Wanneer de meeste mensen kleurstof Pasen eieren, laten ze de eieren zitten voor lange periodes van tijd. Dat is inclusief de tijd voordat de eieren zijn geverfd, en dan met ze af nadat ze zijn ingericht.

    Verwante Verhaal


    7 Tekens Die Je Hebt Voedselvergiftiging

    Helaas, al die tijd uit de koelkast is gewoon vragen om een voedselvergiftiging of voedselinfectie. De AMERIKAANSE Food & Drug Administration (USDA) wijst erop dat verse eieren kan bevatten salmonella is een bacterie die voedselvergiftiging kunnen veroorzaken. Dat is zelfs het geval als de eieren schoon, uncracked schelpen. Salmonella veroorzaakt ongeveer 1,2 miljoen ziekten, van 23.000 ziekenhuisopnames, en 450 sterfgevallen in de VS elk jaar, volgens de Centers for Disease Control and Prevention (CDC), dus dit is niet zeldzaam.

    De meeste mensen die besmet zijn met salmonella diarree, koorts en buikkrampen tussen de 12 en 72 uur nadat ze besmet zijn en de ziekte duurt meestal vier tot zeven dagen. In de meeste gevallen, mensen herstellen zonder behandeling, maar in sommige situaties kan de diarree is zo slecht, dat mensen moeten worden opgenomen in het ziekenhuis, de CDC zegt. In die gevallen kan de infectie zelfs verspreid van een persoon de darmen aan de bloedbaan en vervolgens naar andere plaatsen van het lichaam, waar het kan dodelijk zijn, tenzij het behandeld in de tijd. Kortom, dit is niet een ziekte die u wilt om te knoeien met.

    U kunt eten geverfde paaseieren onder zeer specifieke omstandigheden, hoewel

    Als je eieren zijn buiten te zitten voor een lange periode van tijd, die u zeker wilt om te gooien. “Je moet gooi alle hard-gekookte eieren die zijn achtergelaten bij kamertemperatuur langer dan twee uur,” zegt food safety expert Darin Detwiler, directeur van de Regulatory Affairs van Voedsel en voedselproductie programma aan de Northeastern University. “Als je het verven lang duurt of als je ze te verbergen en het duurt een tijdje voor en tijdens een egg hunt, houd dit in gedachten.”

    Maar, als je toevallig verf je de eieren en gaan ze terug in de koelkast in deze twee-uur geopende venster, je moet het goed om ze op te eten, Detwiler zegt. Het MINISTERIE zegt ook dat een koud ei gerechten moet worden gehouden op het ijs als ze langer dan twee uur, dus dat is ook een optie.

    Als voor de stoffen zelf, je bent waarschijnlijk goed is om te eten eieren zijn geverfd mits u zich houdt aan de overige regels voor voedselveiligheid, zegt Julie Upton, RD, mede-oprichter van de voeding website Eetlust voor de Gezondheid. “Zolang je gebruik maken van een voedsel-veilige verf, de verf mag niet worden een probleem,” zegt ze.

    Bottom line: Als je niet zeker weet of de eieren goed zijn of als u lost track van hoe lang ze al buiten te zitten, het is beter om het zekere voor het onzekere en gooi ze uit.

    Blijf op de hoogte van de nieuwste science-backed gezondheid, fitness en voeding nieuws door je aan te melden voor de Prevention.com nieuwsbrief hier.

    Korin Miller
    Korin Miller is een freelance schrijver die gespecialiseerd is in wellness -, seksuele gezondheid en relaties, en lifestyle-trends, met het werk is opgenomen in de Gezondheid van Mannen, Vrouwen Gezondheid, Self, Glamour, en meer.

    Pouvez-Vous Manger Teindre Les Oeufs De Pâques? Couleur De L’Œuf Conseils De Sécurité Alimentaire

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    • Un expert en sécurité alimentaire et la diététiste expliquer pourquoi il n’est généralement pas bon à manger teindre les oeufs de Pâques.
    • Le risque a moins à voir avec le colorant lui-même (tant qu’il est sécuritaire pour les aliments), et plus à voir avec la quantité de temps que les oeufs ont été laissés à la température ambiante.

      La teinture des oeufs, c’est une tradition de Pâques, et le processus est simple. Vous achetez un oeuf-kit de teinture, de venir avec quelques créatif regarde, et puis l’affichage de vos belles créations.

      Mais il y a une grande question qui revient souvent dans la suite: Pouvez-vous manger teindre les oeufs de Pâques? Après tout, ils sont de la nourriture et qu’ils sont disponibles. Mais… sur le côté, vous venez de mettre le colorant. Alors quel est le problème?

      Pouvez-vous manger teindre les oeufs de Pâques?

      Dans la plupart des cas, vous n’êtes pas censé manger teindre les oeufs de Pâques, et c’est probablement pas pour la raison que vous ne le pensez. Quand la plupart des gens teindre les oeufs de Pâques, ils quittent les oeufs assis pendant de longues périodes de temps. Qui comprend le moment, avant que les oeufs sont teints, puis en montrant off après décorées.

      Article Connexe


      7 Signes Que Vous Avez Une Intoxication Alimentaire

      Malheureusement, tout ce temps à l’extérieur du réfrigérateur est juste poser une maladie d’origine alimentaire. La Food & Drug Administration des états-unis (USDA), les oeufs frais peuvent contenir de la salmonelle, une bactérie qui peut causer une intoxication alimentaire. C’est même le cas si les oeufs sont propres, uncracked coquilles. Salmonella causes d’environ 1,2 million de maladies, de 23 000 hospitalisations, et 450 décès aux états-UNIS chaque année, selon les Centers for Disease Control and Prevention (CDC), donc ce n’est pas rare.

      La plupart des gens qui sont infectés par salmonella de la diarrhée, de la fièvre et des crampes d’estomac entre 12 et 72 heures après qu’ils ont été infectés, et la maladie dure généralement de quatre à sept jours. Dans la plupart des cas, les gens se rétablissent sans traitement, mais dans certaines situations, la diarrhée est tellement mauvais que les gens ont besoin d’être hospitalisés, la CDC dit. Dans ces cas, l’infection peut même se propager d’une personne de l’intestin dans le sang, et puis à d’autres endroits de l’organisme, où il peut être mortel, sauf si elle est traitée à temps. Fondamentalement, ce n’est pas une maladie que vous souhaitez s’amuser avec.

      Vous pouvez manger teindre les oeufs de Pâques dans des circonstances très précises, bien que

      Si vos oeufs ont été assis pendant une longue période de temps, vous voulez certainement vous les jetez. “Vous devriez jeter tout le dur à cuire des œufs qui ont été laissés à la température de la pièce pendant plus de deux heures”, dit expert en sécurité alimentaire Darin Detwiler, directeur des Affaires Réglementaires de la Nourriture et de l’Alimentation Industries de programme à l’Université Northeastern. “Si votre processus de teinture prend beaucoup de temps ou si vous les cacher et il faut un certain temps avant et pendant une chasse aux œufs, veuillez garder cela à l’esprit.”

      Mais, si vous arriver à teindre vos œufs et ils remontent dans le réfrigérateur dans cette fenêtre de deux heures, vous devriez être bien d’en manger, Detwiler dit. L’USDA a également dit que le froid plats à base d’œufs doivent être conservés sur la glace, si ils sont à l’extérieur pendant plus de deux heures, donc c’est aussi une option.

      Comme pour le colorant lui-même, vous êtes probablement bon de manger des œufs qui ont été teints à condition de respecter les autres règles de sécurité alimentaire, explique Julie Upton, RD, co-fondateur de la nutrition site web de l’Appétit pour la Santé. “Aussi longtemps que vous utilisez une de salubrité alimentaire à la teinture, la teinture ne devrait pas être un problème,” dit-elle.

      Bottom line: Si vous ne savez pas si vos oeufs sont d’accord ou si vous avez perdu la trace de combien de temps ils ont été assis sur le banc, il est préférable de se tromper sur le côté sécuritaire et de les jeter.

      Restez à jour sur les plus récentes de la science-backed de la santé, de conditionnement physique et de nutrition des nouvelles en signant pour le Prevention.com newsletter ici.

      Korin Miller
      Korin Miller est un écrivain indépendant spécialisé dans le bien-être général, de la santé sexuelle et les relations et les tendances de style de vie, de travail figurant dans la Santé des Hommes, des Femmes, de la Santé, de l’Autonomie, de Glamour, et de plus en plus.

      How Data Centers Work

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      Environmental Impact and the Future of Data Centers

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      These issues are not just the problem of the companies that create and run the data centers, but also of the surrounding communities and the planet as a whole.

      It is estimated that data centers in the U.S. consumed 61 billion kilowatt hours of electricity in 2006, costing around $4.5 billion [source: Uddin], and 76 billion kilowatt hours in 2010 [source: Glanz]. They reportedly account for 1 to 2 percent of electricity consumption worldwide [sources: Levy, Masanet]. By some accounts, some data centers waste upwards of 90 percent of the power they consume due to running 24/7 at full capacity [source: Glanz]. This massive consumption is bound to take a toll on the environment.

      One research firm found that the information and communication technology industry accounted for around 2 percent of CO2 emissions worldwide [source: Uddin]. And some data center generators emit air-polluting exhaust that often enough fails to meet clean air regulations.

      Changes in this industry are not easy to dictate as there isn’t a government agency specifically tasked with tracking data centers. But a lot of the big players, including Google, Facebook, Microsoft, Apple, Yahoo and eBay, are making huge strides toward reducing the resource consumption of their centers, including creating energy efficient designs, using local resources wisely, striving for carbon neutrality and in some cases generating power using greener sources like natural gas, solar energy or hydropower.

      There’s constant innovation toward efficiency, environmental friendliness, cost effectiveness and ease of deployment. And these days, with Google’s newfound openness on its data center designs and projects like Facebook’s Open Compute, through which they share hardware designs with the public, the data center superpowers are disclosing some of their innovations so that smaller data centers (and the rest of us) might reap the benefits.

      It’s hard to estimate the full impact of our online existence, since our own computers and the other networks that get our information to and from the data centers have to be added into the equation. But without attention to energy efficiency and sustainability of the largest and most obvious culprits, the cloud might keep on generating clouds of pollutants and greenhouse gases.

      Despite any pitfalls, data centers are not going anywhere. Our desire for constant and instant access to information and media content, for sharing of large amounts of data, for moving things off of our own machines and onto the cloud for access from multiple devices, and for perpetual storage of e-mail, photos and other digital data will keep them around. And they will likely pave the way to an even more wired future.

      Author’s Note: How Data Centers Work

      I’m amazed at the sheer size and scope of the huge data centers that make our wired world what it is today. I’m also grateful for them, since I’m online most of the time. It was my dream 20 years ago to be able to choose what, when and where I watched shows without being stuck at home at certain times of night. I didn’t even imagine the binge watching that I’m doing today, or alternate sources of entertainment like YouTube. But our modern server farms have made those possible, as well as non-entertainment related things, like massive open online courses (MOOCs) and other educational resources.

      But I do worry about the consequences. I’m glad that some of the major players are putting efforts into energy efficiency and carbon neutrality in order to conserve our natural resources and prevent unnecessarily huge emissions. We don’t want the tools the Internet makes available, which we can use to make the world better through communication and education, to in turn destroy us. I like habitable climates more than entertainment. I’ll swear to that, right after I finish playing Minecraft.

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      • Fehrenbacher, Katie. "NYT’s data center power reports like taking a time machine back to 2006." Gigaom. September 24, 2012. (October 5, 2013) http://gigaom.com/2012/09/24/nyts-data-center-power-article-reports-from-a-time-machine-back-to-2006/
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      How Data Centers Work

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      Cooling and Power Concerns

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      The byproduct of all that computing power? Heat. Think about how warm your laptop gets, and then think about how many components are running in a single server room.

      ©iStock/Thinkstock

      Data centers have to have tight environmental controls and take in or generate massive amounts of power to keep things running. And these are costly.

      Since servers and other equipment do not do very well in extreme temperatures, most data centers have huge cooling and air flow systems that consume massive amounts of power, and sometimes water. Sensors have to be in place to monitor environmental conditions so that adjustments can be made.

      It’s not just temperature that is a problem. Factors like humidity have to be kept in check. In 2011, Facebook had an actual cloud, not the digital kind, form in one of its data centers, resulting in some servers rebooting and power supplies shorting out due to rain inside the building. As a result, they modified their building-management system and made the servers a little more weather resistant.

      Racks of servers are often arranged in rows that create aisles where the servers are either all facing each other or all facing away from each other in order to control airflow and temperature more efficiently. The aisle where they are facing is the cool aisle, and the air on the hot aisle is funneled accordingly.

      Power consumption is another major concern. It’s absolutely necessary that these facilities have constant access to adequate power — some even have their own power substations. A metric used to judge data center energy efficiency is power usage effectiveness (PUE). It’s a calculation of total energy use divided by energy use purely for computation purposes. Yahoo, Google and Facebook’s PUE scores are around 1.1 or 1.2 for some of their large data centers, although 2.0 is more typical of the industry. That means half the energy goes for computing and half for other tasks or waste [sources: Mone, Levy]. Consulting firm McKinsey & Company found that the average data center was actually only using 6 to 12 percent of its power to do computation work and the rest was lost idling while waiting for the next surge of traffic, likely due to over-provisioning of resources out of fear of delays and downtime [source: Glanz].

      Lots of things are being done to reduce data centers’ power and other resource needs. Server rooms used to be kept around 60 degrees Fahrenheit (15.6 Celsius), but the trend in more energy efficient data centers is to keep them around 80 degrees Fahrenheit (26.7 Celsius), at least on the cool aisle, although not everyone has adopted this practice [sources: Mone, Levy]. The servers apparently do fine at this temperature, and it requires less cooling related power.

      There’s a growing trend to use open air cooling, drawing air from the outside rather than running lots of power-hungry air conditioning units and chillers. Another trend is locating data centers near ready sources of water that can be recycled for cooling use, such as Google’s data center in Finland, which uses seawater. Another is to locate data centers in cold climates.

      Changes in the actual computing gear can help, too. Many components in data centers leak energy, meaning some of the power they use never makes it to doing actual processing — it’s wasted. Replacing older servers with newer, more energy efficient models obviously helps. But equipment can also be redesigned to require less power. Most data centers use traditional off-the-shelf servers and other equipment, but Google and Facebook both use customized servers. Google’s were designed to leave off unnecessary components like graphics cards and to minimize power loss at the power supply and voltage regulator. The panels that contain the manufacturer’s logo are omitted to allow better airflow to and from components, and the company makes some of its own network equipment.

      Additionally, processors and fans can also be made to slow down when they’re not needed. More efficient servers also tend to throw off less heat, further reducing the power consumption needed for cooling. Low-powered ARM servers, originally made for mobile devices but redesigned for server uses, are making their way into data centers, as well.

      Usage of applications fluctuates depending upon what is being done at what time on various software and web applications, any of which have different resource needs. Application resource management is important for increasing efficiency and reducing consumption. Software can be custom written to work more efficiently with the system architecture. Server virtualization can also cut down on power consumption by cutting down on the number of running servers.

      How Data Centers Work

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      Planning for Emergencies and Maintaining Security

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      The system can be set up to reroute traffic in the case that servers or network equipment fail in one area. Traffic can also be load balanced by distributing work evenly over the network and servers to prevent congestion and bottlenecks. Things like data backups, system redundancy and adequate battery backups can also make life easier when outages do occur. Google stores every chunk of data on two or more servers, and really important data is backed up to digital tape. Data centers often have service from multiple Internet service providers (ISPs) for added load sharing and redundancy. If a company has multiple data centers, traffic can even be routed to another facility entirely in the event of complete disaster.

      To keep things running smoothly and stay up with current technology, equipment and software need to be upgraded and replaced regularly. Older systems also have to be supported until they are replaced, which hopefully happens well before they are obsolete. The data center needs an infrastructure that makes replacing old equipment and adopting new technology as easy as possible.

      Data centers often deal with lots of sensitive or proprietary information, so the sites have to be both physically and digitally secure. They might have gates, security doors, alarms and security staff. Some companies are even loath to disclose the locations of their data centers, as well as any equipment and design features that might be trade secrets. When hard drives fail and have to be disposed of, they might be both erased and physically destroyed so that data doesn’t fall into the wrong hands. Networks require security such as firewalls and other methods to keep electronic intruders/hackers out.

      Data centers also need emergency equipment like fire alarms, sprinklers or other fire suppression systems to protect people and equipment. The servers, fans and other devices generate a lot of noise, requiring ear protection, and a lot of heat, requiring other employee and equipment safety measures.

      How Data Centers Work

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      Some Issues Faced by Data Centers

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      While monitoring at a data center is vital, it’s highly unlikely that a tech is sleeping near the server clusters. Digital systems are in place to alert staff in the event of an outage or failure.

      ©iStock/Thinkstock

      Data centers strive for providing fast, uninterrupted service. Equipment failure, communication or power outages, network congestion and other problems that keep people from accessing their data and applications have to be dealt with immediately. Due to the constant demand for instant access, data centers are expected to run 24/7, which creates a host of issues.

      A data center’s network needs are vastly different from those of, say, an office building full of workers. Data center networks are powerhouses. Google’s fiber optic networks send data as much as 200,000 times faster than your home Internet service. But then, Google has to handle over 3 billion search engine requests daily, index many billions of Web pages, stream millions of YouTube videos and handle and store e-mail for hundreds of millions of users, among its many other services [source: Levy].

      Hardly anyone has as much traffic as Google, but all data centers will likely see more and more usage. They need the ability to scale up their networks to increase bandwidth and maintain reliability. The same goes for the servers, which can be scaled up to increase the capacity of the data center. The existing network needs to be able to handle congestion by controlling flow properly. And anything that is holdling up flow needs to be rooted out. A network will only be as fast as its slowest component. Service level agreements (SLAs) with customers also have to be met, and often include things like throughput and response time.

      There are a number of points of possible failure. Servers or networking equipment can go out, cables can go bad or services coming in from the outside, like power and communication, can be disrupted. Systems need to be in place to monitor for, respond to, and notify staff of any issues that arise.Disaster recovery planning is of vital importance in case of major failures, but the minor problems have to be handled, as well.

      How Data Centers Work

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      Networking, Software and Environmental Control

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      Networking and communication equipment are absolutely necessary in a data center to maintain a high-bandwidth network for communication with the outside world, and between the servers and other equipment within the data center. This includes components like routers, switches, the servers’ network interface controllers (NICs) and potentially miles and miles of cabling. Cabling comes in various forms including twisted pair (copper), coaxial (also copper) and fiber optic (glass or plastic). The types of cable, and their various subtypes, will affect the speed at which information flows through the data center.

      All that wiring also has to be organized. It’s either run overhead on trays hung from the ceiling or attached to the tops of racks, or run underneath a raised floor, sometimes on under-floor trays. Color coding and meticulous labeling are used to identify the various wiring lines. Raised floors of data centers generally have panels or tiles that can be lifted for access to get to cabling and other equipment. Cooling units and power equipment are sometimes also housed below the floor.

      Other important data center equipment includes storage devices (such as hard disk drives, solid state drives and robotic tape drives), uninterruptible power supplies (UPSs), backup batteries, backup generators and other power related equipment.

      Data centers also have lots of equipment to handle temperature and air quality control, although the methods and types of equipment vary from site to site. They can include fans, air handlers, filters, sensors, computer room air conditioners (CRACs), chillers, water pipes and water tanks. Some sites will also put up plastic or metal barriers or use things like chimney server cabinets to control the flow of hot and cold air to keep computing equipment from overheating.

      And of course, software is needed to run all this hardware, including the various operating systems and applications running on the servers, clustering framework software such as Google’s MapReduce or Hadoop to allow work to be distributed over hundreds or more machines, Internet sockets programs to control networking, system monitoring applications and virtualization software like VMware to help cut down on the number of physical servers.

      Watch Forests in Peru Disappear Over 5 Years, in Startling NASA Satellite Views

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      Years of deforestation in Peru are visible from space, tracked in a new animation created from NASA satellite views. And the forest loss is escalating at an alarming rate.

      The image series was captured by satellites Landsat 7 and Landsat 8 from 2013 to 2018. Shared on April 19 by NASA Earth Observatory, the animated sequence reveals devastating depletion in the forests of southeastern Peru's Madre de Dios region, covering approximately 1,350 square miles (3,500 square kilometers).

      Andrea Nicolau, a graduate research assistant at the University of Alabama in Huntsville, mapped forest loss in the images using a technique known as spectral mixture analysis, which differentiates between types of land cover based on light properties in every pixel, according to NASA. Using this method, Nicolau determined that about 79 square miles (206 square km) of forest disappeared during the five-year period, and the greatest loss took place between 2017 and 2018. [Gallery: Rare Species of the Andes and Amazon]

      The hardest-hit areas were found in buffer zones close to protected areas. Illegal gold mining is responsible for much of the deforestation on lands belonging to the indigenous Peruvian tribe known as Kotsimba Native Community. Indeed, those involved with mining operations and other activities that threaten Peruvian forests now have easier access to remote locations following the recent completion of Peru's Interoceanic Highway, NASA reported.

      Madre de Dios rests near the Amazon basin and is a biodiversity hotspot, home to species that live nowhere else on Earth. But with deforestation on the rise, plants and animals that are endemic to the region face an uncertain future. By tracking and analyzing patterns of forest loss, conservationists and government officials can better strategize how to protect vulnerable species, according to NASA.

      • Amazon Photos: Trees That Dominate the Rain Forest
      • Photos: Huge Swath of Amazon Preserved in Record-Setting Deal
      • Gallery: Images of Uncontacted Tribes

      Originally published on Live Science.

      A SpaceX Crew Dragon Safety Test Went Very Wrong. Here’s Why That Matters

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      Something went wrong Saturday (April 20) as SpaceX tested the emergency escape system on the company's Crew Dragon spacecraft. The incident was bad news for SpaceX and NASA's goal of putting astronauts into space via a commercial mission in the near future.

      The company and NASA have been a bit cagey about the exact nature of the incident, which both SpaceX and NASA Administrator Jim Bridenstine termed an "anomaly" in their statements. But Florida Today reported that a smoke plume was visible for "miles" around Cape Canaveral after the incident. And an unconfirmed video (shared on Twitter and since deleted) appeared to show a severe explosion in the spacecraft. No one was aboard the craft during the test.

      "The NASA and SpaceX teams are assessing the anomaly that occurred today during a part of the Dragon SuperDraco static fire test at SpaceX Landing Zone 1 in Florida," Bridenstine posted on Twitter Saturday night. "This is why we test. We will learn, make the necessary adjustments and safely move forward with our Commercial Crew Program." [Photos: Colonial-Age Shipwrecks Found Off Cape Canaveral Coast]

      The damaged spacecraft was the same Crew Dragon capsule that traveled to space on March 2 as part of an uncrewed mission (dubbed Demo-1) to the International Space Station, as Live Science sister site Space.com reported.

      The static fire test (in which the spacecraft is held in place) was a precursor to a live test of the SuperDraco thrusters. These are designed to safely heave the capsule away from the rocket in the event of an emergency. The Dragon capsule was being prepared for that test.

      Spaceflight Now reported that the first crewed mission on Dragon, called Demo-2, would have involved a new Dragon capsule. It was scheduled for sometime after July 25, though Spaceflight Now reported that the launch was already likely going to be delayed by several months before this incident happened.

      SpaceX isn't the only company working to build a viable spacecraft for crewed missions. Boeing is due to launch its Starliner capsule uncrewed later this year. However, as Space.com reported, that launch has faced its own delays.

      Until one of these companies gets its crewed rockets working, NASA (which has invested in commercial crewed missions in a big way since the space shuttle's retirement in 2011) is stuck hitching rides for its astronauts to and from space on Russian Soyuz capsules.

      • In Photos: A Look at China's Space Station That's Crashing to Earth
      • 11 Fascinating Facts About Our Milky Way Galaxy
      • 10 Interesting Places in the Solar System We'd Like to Visit

      Originally published on Live Science.

      Turbulent Blobs in Earth’s Core May Explain Sudden Jerks in the Magnetic Field

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      Earth's magnetic shield defends our planet from the scourges of solar wind and cosmic radiation, making life on our planet possible. But every 10 years or so, it can be a real jerk.

      "Geomagnetic jerks" are abrupt changes in the strength of Earth's magnetic field. While some variations in this field are expected to occur gradually, over hundreds to thousands of years, these sudden wobbles in intensity last only a few years at most, and may only alter the Earth's magnetism over specific parts of the world at a time. One of the first jerks documented, for example, briefly warped the field over Western Europe in 1969.

      Since then, a new jerk has been detected somewhere in the world every 10 years or so, and scientists still don’t know what's causing them. While many geomagnetic phenomena, including the northern and southern lights, result from electrified solar wind bashing into Earth's magnetosphere, the jerks are thought to originate from deep inside our planet's core, where the magnetic field itself is generated by the constant churn of liquid-hot iron. The exact mechanism of action, however, remains a mystery. [The 8 Biggest Mysteries About Planet Earth]

      Now, a new study published today (April 22) in the journal Nature Geoscience offers a potential explanation. According to a new computer model of the core's physical behavior, geomagnetic jerks may be generated by buoyant blobs of molten matter released from deep inside the core.

      In the new study, the researchers built a computer model that painstakingly recreates the physical conditions of Earth's outer core, and shows its evolution over several decades. After the equivalent of 4 million hours of calculations (sped up thanks to a French supercomputer), the core simulation was able to generate geomagnetic jerks that closely aligned with actual jerks observed over the last few decades.

      These simulated jerks jiggled the magnetosphere every 6 to 12 years in the model — however, the events seemed to originate from buoyant anomalies that formed in the planet's core 25 years earlier. As those blobs of molten matter approached the outer surface of the core, they generated powerful waves that rushed along magnetic field lines near the core and created "sharp changes" in the flow of liquid that governs the planet's magnetosphere, the authors wrote. Eventually, these sudden changes translate into underfoot manifested as jerky disturbances in the magnetic field high above the planet.

      "[Jerks] represent a major obstacle to the prediction of geomagnetic field behavior for years to decades ahead," the authors wrote in their new study. "The ability to numerically reproduce jerks offers a new way to probe the physical properties of Earth’s deep interior."

      While it's impossible to confirm this simulation's results with actual observations of the core (it's too hot and high-pressured to get anywhere near our planet's center), having a model that can recreate historical jerks with high accuracy could be helpful in predicting the many jerks yet to come, the researchers wrote.

      Knowing when the jerks are comingto expect a jerk could also help monitor and understand how theyits eaffects on other geodynamic processes. For example, is it possible, as one 2013 study in Nature suggested, that the jerks are harbingers of longer days? According to that studythose researchers, sudden changes in the fluid flow at Earth's core may also alter the planet's spin by the slightest bitdegree, actually adding an extra millisecond to the day every six6 years or so. Periods where Earth's day lengthened seemed to correlate with several established instances ofwell-known jerks, the researchers reported.

      If that's true, and geomagnetic jerks are responsible for a slightly longer workday every few years, at least we know we've given them the right name.

      • Infographic: Earth's Atmosphere Top to Bottom
      • Amazing Caves: Picture of Earth's Innards
      • Images: Diving to Earth's Deepest Spot

      Originally published on Live Science.