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Tópico: Curiosidades Científicas

  1. #981
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    The strange and righteous history of the equals sign
    500 years ago, tragic Welsh genius Robert Recorde wanted to teach math to ordinary people.

    =

    https://arstechnica.com/science/2017...ged-the-world/
    Resurrecting an extinct relative of smallpox could pave the way for better vaccines
    Or biowarfare

    Scientists have resurrected a long-extinct virus closely related to smallpox, and all it took was $100,000 and some mail-ordered chunks of DNA. The research, reported as news in the journal Science, could provide a road map to reconstructing the genome for one of the deadliest viruses the world has ever seen. And some scientists fear the information could help terrorists create dangerous biological weapons.

    https://www.theverge.com/2017/7/7/15...ines-bioweapon
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  2. #982
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    The first teleportation of information, into space, using quantum entanglement just happened

    A Chinese research team, led by professor Chao-Yang Lu from the University of Science and Technology of China, have managed to teleport a piece of quantum information from the Gobi Desert to a satellite in space.

    https://www.neowin.net/news/the-firs...-just-happened
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  3. #983
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    Gold, lasers, and antifreeze help reanimate deep-frozen fish
    Call it the reverse Goldfinger
    ...
    So scientists led by John Bischof at the University of Minnesota came up with a new thawing method. Before freezing zebrafish embryos, the researchers injected them with tiny gold cylinders coated in antifreeze. Then, when the scientists were ready to thaw the gold-filled balls of cells, the researchers lit them up with a laser. The laser’s beam heated up the gold particles, warming the embryos from the inside out, according to results published today in the journal ACS Nano.
    ...
    https://www.theverge.com/2017/7/13/1...ep-frozen-fish
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  4. #984
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    A brain implant turns “loser” mice into aggressive fighters
    By stimulating one region of the brain, scientists create mouse supersoldiers.

    https://arstechnica.com/science/2017...sive-fighters/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  5. #985
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    Yes, ancient civilizations on Mars sounds crazy. And yet…
    If such civilizations really existed in the past, could we find them today?

    https://arstechnica.com/science/2017...crazy-and-yet/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  6. #986
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    There may be a lot of water beneath the moon's surface according to a new study

    https://www.neowin.net/news/there-ma...to-a-new-study
    Study: US is slipping toward measles being endemic once again
    Just a tiny increase in vaccine refusals will triple measles cases, cost US millions.

    https://arstechnica.com/science/2017...ic-once-again/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  7. #987
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    Report: Human embryo edited for first time in US, pushes limits
    The data is unpublished, but scientists say it advances effort to erase genetic diseases.

    https://arstechnica.com/science/2017...pushes-limits/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  8. #988
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    IBM and Sony have created a tiny cartridge that can store 330TB of uncompressed data

    https://www.neowin.net/news/ibm-and-...ompressed-data
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  9. #989
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    Evidence that ancient farms had very different origins than previously thought
    Dramatic new hypothesis could change the way we understand human history.

    It's an idea that could transform our understanding of how humans went from small bands of hunter-gatherers to farmers and urbanites. Until recently, anthropologists believed cities and farms emerged about 9,000 years ago in the Mediterranean and Middle East. But now a team of interdisciplinary researchers has gathered evidence showing how civilization as we know it may have emerged at the equator, in tropical forests. Not only that, but people began altering their environments for food and shelter about 30,000 years earlier than we thought.
    ...
    https://arstechnica.com/science/2017...ously-thought/
    With genetic morph, a weird type of anthrax has emerged—and it’s on a rampage
    It’s killing wildlife in African rainforests and may wipe out some chimp populations.

    https://arstechnica.com/science/2017...-on-a-rampage/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  10. #990
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    Here’s the scientific reason it’s better to drink whiskey on the rocks
    It’s chemistry
    ...
    The distinctive taste of whiskey is largely caused by a molecule called guaiacol, which has one section that likes water and one section that doesn’t like water. In a study published today in the journal Scientific Reports, researchers simulated what happens to guaiacol when there are different concentrations of water, and which combination makes the molecule most potent.

    Of course, the liquid in the Jack Daniels bottle isn’t pure alcohol to begin with. By the time whiskey is in the bottle, it’s usually already about 40 percent alcohol, though this can vary. The simulations showed that at the range of 40 percent to 45 percent alcohol, guaiacol is likely to be floating around at the top of the glass, which enhances both the smell and taste. So adding just a little bit of water can improve the taste of the drink because it pushes the molecule to the surface instead of having it dispersed weakly in the rest of the mixture.
    ...
    https://www.theverge.com/2017/8/17/1...king-chemistry
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  11. #991
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    What’s warping the faces of monkeys in Uganda?
    A plague of concave faces, missing nostrils, and cleft lips
    ...
    Nearly every sample of fresh maize seeds and stems had levels of chlorpyrifos that were higher than authorized. Chlorpyrifos is an insecticide that’s recently been a subject of controversy in the US. Used since the 1960s, chlorpyrifos works on insects by overexciting their nervous system, eventually leading to death. At high enough doses, it has similar effects in humans. Researchers have spent decades telling the Environmental Protection Agency (EPA) that the chemical is dangerous and should be uniformly banned, citing evidence linking chlorpyrifos to neurodevelopmental problems in children, who are more vulnerable to the chemical than adults. A recent EPA report showed the agency had accepted the findings about the chemical’s dangerous impact and appeared to be on track to ban it, but in March, EPA Administrator Scott Pruitt took a meeting with the largest US producer of chlorpyrifos, Dow Chemical, and has since denied the proposed ban.
    ...
    “If the chimpanzees are getting this mostly from runoff and eating a little bit of the seeds and crops,” says Chapman, “what about all of the people?”
    ...
    https://www.theverge.com/2017/8/25/1...mate-deformity
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  12. #992
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    Bucking FDA, Peter Thiel funds “patently unethical” herpes vaccine trial
    With no FDA or institutional oversight, investors hope to send a message.
    ...
    The vaccine—a live but weakened herpes virus—was first tested in a 17-person trial on the Caribbean Island of St. Kitts without federal oversight or the standard human safety requirement of an institutional review board (IRB) approval. Biomedical researchers and experts have sharply rebuked the lack of safety oversight and slammed the poor quality of the data collected, which has been rejected from scientific publication. However, investors and those running the trial say it is a direct challenge to what they see as innovation-stifling regulations by the Food and Drug Administration.
    ...
    https://arstechnica.com/science/2017...vaccine-trial/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  13. #993
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    First genetic engineering therapy approved by the FDA for leukemia
    Safety risks still an issue for the CAR-T therapy, but new hope for young patients.

    https://arstechnica.com/science/2017...emia-patients/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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  14. #994
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    These tiny, light-activated nanomachines can kill cancer cells within minutes
    50,000 of them are the width of a strand of human hair

    https://www.theverge.com/2017/8/31/1...ncer-treatment
    Plumbing discovery reveals the rise and fall of the Roman Empire
    Ancient lead pollution in a Roman harbor shows the city’s fortunes grew with its pipes.

    https://arstechnica.com/science/2017...-roman-empire/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  15. #995
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    At times during Harvey, the European model outperformed humans
    NOAA's new hurricane model, the HMON, performed terribly.
    ...
    When looking at the data, we see several interesting trends. Among the global models, through a 72-hour forecast, the UK model is generally a little bit more accurate than the European model. However at longer time frames, four- and five-day forecasts, the European model shows its class. In fact, the four-day forecasts of the European model were more accurate than the consensus model or even the human forecasters at the National Hurricane Center who weigh all of this data to make their five-day forecasts and draw the cone of uncertainty.
    ...
    https://arstechnica.com/science/2017...formed-humans/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  16. #996
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    Jupiter's vividly glowing auroras have a mysterious power source
    Electrons fired at up to 400,000 volts



    https://www.theverge.com/2017/9/6/16...oras-electrons
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  17. #997
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    US forecast models have been pretty terrible during Hurricane Irma
    NOAA's best weather model seems to be getting worse with hurricanes, not better.

    https://arstechnica.com/science/2017...urricane-irma/
    The mysterious Voynich manuscript has finally been decoded
    History researcher says that it's a mostly plagiarized guide to women's health.

    https://arstechnica.com/science/2017...-been-decoded/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  18. #998
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    Nooaa tão boa..sim senhor. E gastam bem mais do que os europeus

  19. #999
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    So much for that Voynich manuscript “solution”
    Librarians would have "rebutted it in a heartbeat," says medieval scholar.

    https://arstechnica.com/science/2017...nich-solution/
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
    E nós aqui sem parar numa Terra a girar…


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  20. #1000
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    Volcanic ice caves on Antarctica may host complex life
    Volcanoes may provide life refuges when icy conditions prevail.
    ...
    Yet somehow, life exists on Antarctica. And not just microbial life; there are insects and worms present, too. How have they survived the intensely icy conditions on the continent? A new paper suggests that volcanoes could be the key to life's persistence in our planet's deep south.
    ...

    https://arstechnica.com/science/2017...-complex-life/
    Hurricane Irma wiped out so many plants that these Caribbean islands have changed colors
    Hurricane Irma turned these green landscapes brown



    https://www.theverge.com/2017/9/11/1...ned-brown-nasa
    Lá em cima há planícies sem fim; Há estrelas que parecem correr; Há o Sol e há dia a nascer;
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