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Tópico: Curiosidades Científicas

  1. #21
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    Quote Post Original de St3v3n Ver Post
    Chuck norris did a home run... that´s what happend... duh!
    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. #22
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    The Short, Strange History of Decimal Time

    For thousands of years, we've divided days into 24 hours, hours into 60 minutes, and minutes into 60 seconds. But why do we have to do that? Here's the story of the one gloriously failed attempt to decimalize time.
    To save their species, fish hybridized themselves into extinction
    ...
    We often think of a species in terms of its ability to reproduce - if one individual can breed with another, then they are both part of the same species. And while this genetic compatibility is a good rule of thumb, it's not entirely the case, as lots of closely related species can indeed crossbreed and, if this happens on a large enough scale, even form hybrid species. Fish species that split apart as much as 20 million years ago can still hybridize back together again, effectively rendering their time as separate species an evolutionary cul-de-sac.


    ------- Post adicionado às 18:58 ------- Post anterior colocado às 18:30 ----------

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    Kiwi eggs
    Kiwi eggs were known as one of the biggest bird egg in the whole world. The egg is around a size of an ostrich’s egg. Kiwi egg can be able to take 20% of mother’s body. In Human, a baby in full term is only 5% of a mother’s body weight.
    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. #23
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    Researchers resurrect new species of life from ancient Andean tomb
    ...
    An ancient alcoholic beverage was commonly included in these burial vaults. Now, by examining the clay vessels used to ferment and store this brew, a team of South American researchers has managed to not only recover the microbes the indians used to ferment the ancient beverage, they've actually revived them...and they're unlike any species they've ever seen.
    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. #25
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    Why did supersized coyotes suddenly shrink 10,000 years ago?
    Just 11,500 years ago, coyotes were about 1.5 times as big as they are today. By 10,000 years ago, they had shrunk to their current proportions. What could have made these predators get so much smaller, so quickly?
    Longo, confuso mas interessante:
    How the Quest for the Perfect Calendar Accidentally Created February 30
    ...
    The republic was governed by a pair of consuls who both served for a term of one year. But depending on how it was defined, a year could be either 355, 377, or 378 days, which meant certain consuls would get to hold power for significantly longer than their predecessors and successors. The decision to lengtenh the year fell to the pontifex maximums, a post that had begun as the high priest of the Roman religion but had since evolved into a powerful political post coveted by the elite. As Julius Caesar and his political rivals jockeyed for control, the decision to add leap months stopped being about keeping the calendar aligned with the year and started being almost exclusively about sticking it to one's political enemies.
    ...
    How an 1870s marine expedition changed oceanography and drove eight sailors insane
    ...
    Although ship's records only vaguely references sailors 'going mad,' or leaving the ship at various ports, it's known that at least eight people did go insane during the voyage, and one threw himself into the sea. Others picked the more conventional method of waiting until they got to a likely port and running like hell. Still others died of sickness or simply became sick and were put ashore at the next port and left.
    ...
    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. #26
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    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. #27
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    Asteroid to Threaten Earth in 2013
    Everybody duck, there’s another (hopefully) near miss asteroid heading back to Earth next year. Heading back to Earth is the keyword here, since it has already crossed Earth’s path on several occasions within the past three years undetected. This doesn’t speak well for the astronomer’s ability to locate possible danger situations in time to take any preventative actions.

    If the entire asteroid is to crash into the planet, the impact will be as hard as in the Tunguska blast, which in 1908 knocked down trees over a total area of 2,150 sq km (830 sq miles) in Siberia.


    ------- Post adicionado às 09:46 ------- Post anterior colocado às 09:26 ----------

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    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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  8. #28
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    Scientists and tourists put Antarctica at risk for an invasion
    In 2007 and 2008, various groups organized a collaborative program that promoted research in the polar regions. Called the "International Polar Year," it brought scientists, tourists, and research projects to Antarctica. However, it also brought something more ominous: thousands of seeds. Often, when someone steps onto Arctic land, they introduce potentially invasive species through seeds that cling to their clothing, shoes, and bags. A new study in PNAS describes who is bringing these seeds into Antarctica, and how much of a threat they actually pose.


    ------- Post adicionado às 22:13 ------- Post anterior colocado às 21:55 ----------

    PS:
    Serious...
    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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  9. #29
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    Most violent fossil ever shows the final record of a three-way hunt

    150 million years ago, a flying reptile saw a fish in the waters of the Jurassic Ocean. The reptile caught its prey...and then was almost immediately grabbed by a much larger fish. That's when things really started to go wrong.

    It's rare to see a fossil that records the final moments of two different creatures, let alone three. But that's what happened here, as the pterosaur species Rhamphorhynchus was almost devoured by the large fish Aspidorhynchus. I say "almost devoured" because something fatally interrupted the fish before it could complete its meal — hence, why we have the fossil.
    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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  10. #30

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    10,000 RPM Artificial Heart With No Pulse Replaces Human/Animal Hearts
    Oh god. Sou gay
    Última edição de Pro-2026 : 13-09-2012 às 14:36

  11. #31
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    ChronoZoom takes you through 14 billion years of space-time via HTML5
    ...
    Yesterday, Microsoft Research, Russia's Moscow State University, and UC Berkeley launched ChronoZoom, a dynamic atlas of time. It is not meant to direct travel so much as direct an imaginative exploration of history, writ large.
    http://www.chronozoomproject.org/#/t55



    Squids evolved giant eyes to watch out for sperm whales
    The colossal and giant squids that lurk in the ocean depths are truly remarkable creatures.

    Indeed, for creatures like these huge squid that typically live a mile beneath the ocean surface, big eyes really serve very little purpose. Most creatures down there have developed bioluminescence, which means you don't need particularly large eyes to spot prey.
    The one exception is if a really large object is moving towards you — then, such huge eyes could let you spot the approaching beast up to 400 feet away. If a sperm whale is near, these eyes give squid — which, unlike the whale, can't use sonar to detect an approaching adversary — time to take evasive action.
    Última edição de ímpar : 17-03-2012 às 16:49
    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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  12. #32
    Old School Member Avatar de joaoreis00
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    Default Planetas que 'viajam' a 50 milhões quilómetros/hora


  13. #33
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    Quote Post Original de joaoreis00 Ver Post
    [IMG][/IMG]
    Senhor dai-me sabedoria
    Para suportar alguns colegas.
    Por que se me dais força...
    Parto-lhes o focinho!!!!


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    Agarra que é ladrão!

  14. #34

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    Quote Post Original de joaoreis00 Ver Post

    Imagino a despesa em gasolina.

  15. #35
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    Chuck Norris a jogar á bola com os Aliens
    Intel Core i7 920 [email protected] Ghz 1.26v Asus P6T ; 3x 2048MB OCZ XTS Platinum Series 1600MHZ 7-7-7-19 ; Samsung F1 1TB & 2x Samsung F3 500GB Raid1 & Intel SSD 80Gb Samsung 27" @ Evga 580GTX SC PhysX Corsair HX1000 ; Creative X-FI Titanium Fatal1ty Cooling 360mm Xchanger Rad,240mm EK Coolstream Rad, EK Supreme Plexi Block, EK-FC580 GTX Acetal-Nickel Graphic Block, Laing DDC12v Pump Feser UV Blue Liquid Windows 7 64 Ultimate Thermaltake ARMOUR Black


  16. #36
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    The last mammoths died out just 3600 years ago…but they should have survived
    ...
    Wrangel Island is an uninhabited scrap of land off the northern coast of far eastern Siberia. It's 37 miles from the nearest island and 87 miles from the Russian mainland. It's 2,900 square miles, making it roughly the size of Delaware. And until about 4,000 years ago, it supported the world's last mammoth population. For 6,000 years, a steady population of 500 to 1,000 mammoths endured while their counterparts on the mainland disappeared.

    It's truly remarkable just how recent 1650 BCE really is. By then, the Egyptian pharaohs were about halfway through their 3000-year reign, and the Great Pyramids of Giza were already 1000 years old. Sumer, the first great civilization of Mesopotamia, had been conquered some 500 years before. The Indus Valley Civilization was similarly five centuries past its peak, and Stonehenge was anywhere from 400 to 1500 years old. And through all that, with all of humanity in total ignorance of their existence, the mammoths lived on off the coast of Siberia.

    So then, what finally killed off the mammoths?
    Vídeo:
    Why cats can survive falls that would kill any other animal

    Cats can famously fall from skyscrapers and only suffer the most minor of bruises, including the recent story of a cat surviving a 19-story fall in Boston with only a bruised chest. What's the secret of this feline survival?
    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. #37
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    Researchers uncover 8,000 years of human history hidden in the Middle East
    ...
    But now, researchers have turned to satellite imagery to uncover a vast network of over 14,000 long-overlooked Mesopotamian settlements, spanning 8,000 years of ancient civilization. Their findings represent a monumental step forward for the fields of archeology and anthropology, and suggest that an aerial perspective may hold the key to unlocking the mysteries of humanity's first major settlements.
    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. #38
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    DNA reveals that cows were almost impossible to domesticate
    They discovered that the differences between these ancient DNA sequences and those of modern cattle were so minute that the only way to explain them would be if the original cattle population was extremely small, with about 80 cattle the most likely number. As the researchers explain in Molecular Biology and Evolution, since the domestication process was spread out over a thousand or so years, that's the equivalent of only adding two new cattle each generation.

    That's a recipe for astoundingly low genetic diversity — and yet it seems that pretty much every living cow can claim ancestry to those eighty cows and no others. It's a testament to how skilled ancient humans must have been at breeding cattle that the population survived and thrived the way it did, as these cows were effectively domesticated into an instant population bottleneck.
    ...
    University of Mainz research and study co-author Joachim Burger explains just what made these beasts so hard to handle:

    "Wild aurochs are very different beasts from modern domestic cattle. They were much bigger than modern cattle, and wouldn't have had the domestic traits we see today, such as docility. So capturing these animals in the first place would not have been easy, and even if some people did manage snare them alive, their continued management and breeding would still have presented considerable challenges until they had been bred for smaller size and more docile behavior."
    ...
    More Evidence that Life First Came from Comets
    ...
    Blank's research team simulated the trip the amino acids would have taken through the atmosphere by blasting them with a gas gun, a device capable of shooting a high-pressure shot of gas at supersonic speeds. The amino acids would have been protected by being on the interior of the comets, and the heat and shock of the trip and impact was not enough to break them down. In fact, pressure from the impact apparently counteracted the intense heat and even supplied the energy needed for the amino acids to start forming peptide bonds, allowing the creation of proteins. That's right, the crash could be what triggered their transformation into a more complex form.
    ...
    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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  19. #39
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    More evidence links a family of insecticides to bee colony collapse

    For nearly six years, a mysterious condition called colony collapse disorder (CCD) has been wreaking havoc with the honey bee population in the US and Europe. The cause of CCD remains elusive, with various fingers being pointed at mites, fungi, viruses, pesticides, and even cell phone emissions. Today, a pair of studies were published in Science that suggest that sublethal exposure to a family of common pesticides called neonicotinoids might play a contributing role in the great bee die-off.
    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. #40
    Old School Member Avatar de joaoreis00
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    Default Tornado solar gigante filmado pela primeira vez


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