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Tópico: Curiosidades Científicas

  1. #821
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    Discovery of plastic-eating bacteria could lead to new ways to recycle

    A newly-discovered bacterium that feeds on plastic could help develop new recycling methods. The discovery was made by researchers from Japan, who say that the microorganism is remarkable for its ability to breakdown completely a common type of plastic known as PET. This digestive process is slow, and the short-term implications of the discovery are uncertain, but studying the bacterium — which has been given the name Ideonella sakaiensis — could lead to new ways to safely get rid of junk material.

    http://www.theverge.com/2016/3/10/11...g-baterium-pet
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  2. #822
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    Mathematicians Discovered Something Super Freaky About Prime Numbers

    Recently, a pair of mathematicians decided to test this “randomness” assumption, and to their shock, they discovered that it doesn’t actually exist. As reported in New Scientist, researchers Kannan Soundararajan and Robert Lemke Oliver of Stanford University in California have detected unexpected biases in the distribution of consecutive primes.

    The mathematicians made the discovery while performing a randomness check on the first hundred million primes. Within that set, a prime ending in 1 is followed by another ending in 1 just 18.5 percent of the time. That shouldn’t happen if they were truly random—we should expect to see this happen 25 percent of the time (keep in mind that primes can only end in 1, 3, 7, or 9). So while this isn’t a pattern—it’s also not totally perfectly random. In terms of the back-to-back distribution of the other numbers, primes ending in 3 and 7 appeared 30 percent of the time, and consecutive 9s appears about 22 of the time. Importantly, this observation has nothing to do with the base-10 numbering system, and is something inherent to primes themselves.

    http://gizmodo.com/mathematicians-di...out-1764839266
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  3. #823
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    Mind-Blowing Magic Magnets

    The magnets in this video are actually the world's first smart magnets, or polymagnets. How do these printable magnets work? Watch the video below and you'll see why they are called "mind-blowing magic magnets."



    http://www.hardocp.com/news/2016/03/..._magic_magnets
    Researchers use synchrotron to read ancient, burned scrolls from Rome
    Scientists used high-energy beams to make an incredible archaeological discovery.

    One palatial residence in Herculaneum contained hundreds of priceless written scrolls made from papyrus, singed into carbon by volcanic gas. It was long believed that these scrolls would never be readable. But now, a massive X-ray microscope at the European Radiation Synchrotron Facility has allowed researchers to see what was written on these ruined documents.

    http://arstechnica.com/science/2016/...lls-from-rome/
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  4. #824

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    Essa dos ímanes é qualquer coisa.

  5. #825
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    Ancient virus found hibernating in the human genome—and it might wake up
    In DNA dig, scientists unearth more viral code, which makes up >8% of our genomes.
    ...
    More than eight percent of the human genome is not human at all—it’s from viruses. And scientists are still digging up yet more viral code from human DNA that may well influence our lives.
    ...
    http://arstechnica.com/science/2016/...might-wake-up/
    Cartoons from XKCD creator will appear in high school science textbooks
    Teens will get chemistry, biology, and physics explainers from Munroe’s latest book.



    http://arstechnica.com/the-multivers...nce-textbooks/
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  6. #826
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    Minimalist genome—only 473 genes—synthesized and used to boot up a cell
    This is very close to the basic requirements of life as we know it.

    http://arstechnica.com/science/2016/...oot-up-a-cell/
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  7. #827
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    Vintage Mechanical Calculator Shows Why It's a Bad Idea To Divide by Zero

    It has to do with how such machines work, and also with the nature of division—it’s basically just “glorified subtraction,” as the folks at Numberphile will tell you. To divide 20 by 4, the mechanical calculator perform a sequence of steps: 20 minus 4 is 16, 16 minus 4 is 12, 12 minus 4 is 8, 8 minus 4 is 4, and 4 minus 4 is 0. Voila! It takes five steps, so 20 divided by 4 equals 5.

    But 20 divided by zero is just subtracting nothing from 20 over and over again. The calculator never arrives at an answer because it would take an infinite number of steps. And infinity is really more of a concept than an actual number.



    http://gizmodo.com/vintage-mechanica...dea-1767845383
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  8. #828
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    Transparent Wood Could Replace Glass, Become Coolest Building Material Ever

    Wood is a great material because it’s cheap, renewable, and versatile. But this crazy transparent wood that scientists in Sweden brewed up is nuts. It could replace glass for some seriously eye-catching architecture, and even be used in cheap solar panels or windows.



    http://gizmodo.com/crazzy-transparen...e-b-1768192296
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  9. #829
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    “I didn’t mean to” doesn’t count for much in some societies
    The significance of the moral intent behind an action is weighed differently.
    ...
    Apologies often march hand-in-hand with a claim about intent—"But I didn't mean it like that!" Even our legal systems recognize this idea. We differentiate between accidentally killing a person (manslaughter) and intentional, planned killing (first-degree murder). The intent of a person clearly matters in how we assess their offenses.
    ...
    People in Los Angeles judged actions with high intent much more severely than actions with low intent; people in Storozhnitsa even more so. On the other end of the scale, Yasawa fishing communities in Fiji showed a much smaller difference between high-intent and low-intent actions, as did Himba herders from Namibia.
    ...
    http://arstechnica.com/science/2016/...ome-societies/
    Scientists used stem cells to grow hairy, fluorescent skin for transplants
    The skin was implanted in hairless mice

    http://www.theverge.com/2016/4/1/113...s-riken-tissue
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  10. #830
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    Researchers Just Discovered a New State of Matter

    Scientists have theorized for decades that an additional state of matter exists, but despite tantalizing hints to its presence, details about this mystery state have remained elusive—until now.

    http://gizmodo.com/researchers-just-...ter-1768888270
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  11. #831
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    Researchers keep pig heart beating in baboon belly for >2 years—a new record
    The cross-species transplant is a step closer to using pig parts in humans.

    http://arstechnica.com/science/2016/...-a-new-record/
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  12. #832
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    Why on Earth Is China Shooting Crude Oil Into Space?

    On April 6th, China’s SJ-10 satellite will launch into orbit from the remote Jiuquan spaceport in the Gobi desert. The event would be unremarkable if not for the satellite’s rather unusual payload: six titanium cylinders of crude oil, compressed to 500 times standard atmospheric pressure.
    Launching stuff into orbit is expensive, and we don’t exactly need oil in outer space. (Most rockets today run on liquid hydrogen and oxygen.) But China’s not interested in building a fleet of gas-guzzling spacecraft. It’s interested in finding more oil on Earth to support its gas-guzzling cars.

    And strangely enough, running experiments in zero-g might be the best way to do that. The Soret Coefficient in Crude Oil Experiment, which consists of six tiny samples of highly compressed black gold, will study how the complex mess of molecules found in petroleum redistribute under intense pressures and uneven temperatures.

    http://gizmodo.com/why-the-hell-is-c...ace-1769176779
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  13. #833
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    Sweet drug clears cholesterol, reverses heart disease—and was found by parents
    Here’s how parents of kids with rare disease found what may be blockbuster drug.

    Two parents’ quest to save their twin daughters’ lives from a rare, degenerative genetic disorder may end up saving and improving the lives of millions.
    After digging through medical literature and fitting pieces of data together, the non-medically trained couple contacted German researchers and suggested that a chemical called cyclodextrin may be able to treat atherosclerosis—the hardening of arteries with cholesterol-rich plaques, which is a precursor to heart attack, stroke, and other cardiovascular diseases.

    http://arstechnica.com/science/2016/...nd-by-parents/
    All-bacterial battery makes a nutrient when charged, eats it to discharge
    Cathode got its start in cow manure.

    http://arstechnica.com/science/2016/...-to-discharge/
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  14. #834
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    We Finally Know Why the North Pole Is Moving East

    Through careful observations and mathematical models, Adhikari has discovered that our planet’s recent polar wanderlust has two causes: the melting of the Greenland and West Antarctic ice sheets, and changes in the global distribution of water stored on land. Both of these are related to a single underlying phenomenon.

    “The bottom line is that climate change is driving the motion of the polar axis,” Adhikari said. His findings are published in Science Advances today.

    http://gizmodo.com/we-finally-know-w...ast-1769588584
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  15. #835

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    Or is the motion of the polar axis causing climate changes? #thereisnoglobalwarming

  16. #836
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    Chinese scientists genetically modify human embryos for the second time
    With the same limitations as last year's breakthrough work

    Scientists in China have reported genetically modifying human embryos in what is only the second published experiment of its kind. Last year, a different team of Chinese researchers edited human embryos in an attempt to remove genes responsible for a dangerous blood disorder. In this new research, scientists from Guangzhou Medical University tried to add a mutation to embryos instead, attempting to make them HIV-resistant. In both cases, the experiments were only partially successful, and were carried out using non-viable human embryos that were incapable of growing into adults.

    http://www.theverge.com/2016/4/11/11...hiv-resistance
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    Mysterious mutants: 13 masked people should have devastating diseases—but don’t
    Their puzzling genetic resilience could hold clues to curing crippling diseases.

    After sifting through the genetic codes of nearly 600,000 adults, researchers discovered that 13 of them were healthy despite carrying mutations that were thought to guarantee devastating childhood disorders, such as cystic fibrosis and those that cause severe skeletal malformations. The authors, led by Stephen Friend of the Icahn School of Medicine at Mount Sinai in New York, hypothesize that these 13 apparently normal adults have other genetic elements that compensate or buffer the effects of those mutations. If that’s true and researchers can pinpoint the source of their genetic resilience, the findings may offer critical information about how to cure these diseases in the not so genetically lucky, the authors report in Nature Biotechnology.

    http://arstechnica.com/science/2016/...ases-but-dont/
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  18. #838
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    Última edição de joaoreis00 : 13-04-2016 às 15:40

  19. #839
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    Brain Implant Enables Quadriplegic Man to Play Guitar Hero With His Hands

    Six years ago while vacationing with friends, Ian Burkhart suffered an accident that left him paralyzed from the shoulders down. A new system now allows him to make complex movements with his hand and fingers, making him the first person in history to regain function using signals from his brain.

    http://gizmodo.com/brain-implant-ena...r-h-1770566874
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    New Evidence Suggests That Human Limbs Evolved From Shark Gills



    http://gizmodo.com/new-evidence-sugg...sha-1771427923
    Lab Mice Are Freezing Their Asses Off—and That’s Screwing Up Science

    Most science labs maintain a temperature far below levels preferred by mice, and it’s taking a toll on their health. New research suggests these chilly mice are skewing science results across a wide range of research areas—and the problem is far worse than anyone realized.

    http://gizmodo.com/lab-mice-are-free...ewi-1771796664
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