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Tópico: Curiosidades Científicas

  1. #1061
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    Tracing how horse domestication turned the Eurasian Steppe into a highway
    Domesticated horses reshaped Central Asia, but where did they come from?

    https://arstechnica.com/science/2018...nto-a-highway/
    Genghis Khan’s Mongol horde probably had rampant Hepatitis B
    Viral DNA recovered from ancient human remains sheds light on HBV's evolutionary past.

    https://arstechnica.com/science/2018...t-hepatitis-b/
    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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  2. #1062
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    Greenland ice cores track Roman lead pollution in year-by-year detail
    Studying the ice cores may help reconstruct fluctuations in the ancient economy.
    ...
    The traces of lead in ancient layers of Arctic ice got there because, somewhere in Europe, a Roman foundry was busy smelting ore. But it’s eerie to realize that other layers are clean because those miners and foundry workers were suddenly gone—dead, fleeing, or fighting.

    McConnell and his colleagues saw a characteristic pattern around wars throughout Roman history. When conflict came to a mining region, as it did during the three Punic Wars between Rome and Carthage, it disrupted life and work in the region. That shows up as a year or two of slightly cleaner ice in Greenland, since Europe was producing less lead pollution.

    At the outbreak of the first Punic War in 264 BCE, for instance, the amount of lead in the Greenland ice layers dropped abruptly. But production ramped up again closer to the final years of the war, as Carthage minted more silver coins to pay its mercenary forces.
    ...
    https://arstechnica.com/science/2018...y-year-detail/
    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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  3. #1063
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    It seems someone is producing a banned ozone-depleting chemical again
    Decline of CFC-11 has slowed in recent years, pointing to a renewed source.

    That keeps the hole in the ozone layer on track to shrink over the coming decades. However, a new study shows that someone has been cheating in the last few years.

    https://arstechnica.com/science/2018...hemical-again/
    Researchers claim to have transferred a memory between two sea slugs
    Something was shifted that altered neural activity—was it a memory?

    https://arstechnica.com/science/2018...two-sea-slugs/
    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. #1064
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    NASA’s EM-drive is a magnetic WTF-thruster
    Test reveals that the magic space unicorns pushing the EM-drive are magnetic fields.

    https://arstechnica.com/science/2018...-wtf-thruster/
    Vaccination method that wiped out smallpox gets unleashed today on Ebola
    As Ebola outbreak flares, experimental vaccine gets trial by fire.

    https://arstechnica.com/science/2018...oday-on-ebola/
    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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  5. #1065
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    Explaining the ‘Bee-pocalypse’ once and for all
    Bees are in trouble... but not the ones you’re thinking of

    https://www.theverge.com/science/201...arming-threats
    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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  6. #1066
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    US gov’t employee in China left with brain injury after strange sounds, pressure
    The case draws eerie similarities to mysterious "health attacks" in Cuba.

    https://arstechnica.com/science/2018...-raises-alert/
    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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  7. #1067
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    This capsule of glowing E. coli will probe your gut for signs of trouble
    Engineers married genetic and electrical circuitry for this gulp-able sensor.

    https://arstechnica.com/science/2018...ns-of-trouble/
    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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