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  1. #41
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    New fossils complicate human family tree
    Our own genus may have started off with two species.
    ...
    The authors conclude that these complete skulls come from a relatively large, flat-faced species called Homo rudolfensis. The morphology of the lower jaw doesn't fit that of jaws attributed to H. habilis, which are much more pronounced, and reflect a more protruding lower face. As a result, the authors conclude, "The new fossils confirm the presence of two contemporary species of early Homo."
    ...
    This finding seems to provide strong evidence that the period in which the Homo genus evolved saw several distinct populations with significant morphological differences. Somehow, this confusion gave rise to our direct ancestor, Homo erectus. The exact ancestral relationships and the timing are clearly going to have to wait for more complete skeletons that can allow a detailed analysis of shared features. But the finding nicely shows how even a field that is noted for its blockbuster finds still proceeds through many incremental findings.
    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. #42
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    Mating with Neanderthals is off-again, on-again
    Papers vote for and against interbreeding, push human-chimp split back.
    Ancient humans may not have interbred with Neanderthals, after all
    If you hail from outside of Africa, there's a decent chance that you share as much as 4% of your DNA with a long-extinct lineage of Neanderthals. Many scientists agree that this small percentage of shared genetic information is evidence that humans and Neanderthals interbred with one another in Europe tens of thousands of years ago.

    But what if the consensus is wrong?
    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. #43
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    Earliest Asian Skull Found; Likely Around 50,000 Years Old
    Find could lend credence to idea that man evolved in Asia, rather than Africa
    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. #44
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    High quality Denisovan genome sheds light on human evolution
    Sequencing our extinct relatives let us know how we differ from chimps.

    The discovery that a second branch of the human family shared Asia with our ancestors and the Neanderthals was a real shock, but the Denisovans have continued to surprise many. All we have of them is a bit of a finger and some molars, but those few fragments have yielded a wealth of DNA, and with it the knowledge that the Denisovans interbred with the ancestors of some modern human populations. Now, with the help of a new approach to sequencing ancient DNA, we actually know more about the Denisovans' genome than we do about Neanderthals'. In the process, we've discovered some of the changes that are distinct to modern 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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  5. #45
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    New DNA evidence could explain what happened to the Neanderthals
    ...
    Neanderthals were short and barrel chested, pale-skinned with large jaws and sloping foreheads. Denisovans, who lived exclusively in Asia, may have been darker skinned but we don't have enough fossil evidence to say for sure what their bodies would have looked like.

    What is certain is that when the dark-skinned, tall Homo sapiens met the Neanderthals, it was probably like two alien groups meeting on Star Trek. By that I mean one group had head lumps in slightly different places than the other — but both were both humanoids, capable of bearing children together.
    ...
    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. #46
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    The Reason Early Humans May Have Practiced Infant Cannibalism
    Back during the Early Pleistocene era in Europe, there lived a now-extinct subspecies of humans called Homo antecessor. Archeological evidence indicates that this species practiced cannibalism — and that they preferred the meat of young children. The question now being asked by anthropologists is why. The answer, it would seem, may lie in the cannibalistic habits of chimpanzees — a species that eats the young of its rivals to protect its territories.
    ...
    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. #47
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    Study finds humanity's origins clouded by isolation and interbreeding
    Oldest distinct population—identified. But humans may never get specific site of origin.
    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. #48
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    When did humans and Neandertals stop having sex?
    Based on their analysis, the scientists concluded that Neandertals and modern humans last exchanged genes anywhere between 37,000 and 86,000 years ago (with 47,000 years ago being the most likely). This is well after modern humans appeared outside of Africa, but likely before they spread east into Asia. The study strongly indicates, therefore, that Neandertals did have children with the direct ancestors of non-Africans.
    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. #49
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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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  10. #50

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    Não.........

  11. #51
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    Are humans getting dumber?
    A new study published in Trends in Genetics is suggesting that humans are slowly but surely losing their intellectual and emotional capacities. According to Stanford University's Gerald Crabtree, humanity peaked in intelligence about 2,000 years ago, and we've been heading downhill since then, owing to genetic mutations that aren't being selected against.
    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. #52
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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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  13. #53
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    Did fist fighting change the course of human evolution?
    ...
    Morgan and Carrier found that positioning the fingertips against the central palm and wrapping the thumb across the backs of the pointer and middle fingers served as a supportive "buttress" for the hand, and locked the digits into a solid shape that facilitated the transfer of energy from the fingers to the wrist. This finger positioning not only quadrupled the rigidity of the first knuckle joint, it also doubled the ability to deliver "punching" force, relative to the more loosely-arranged conformations.

    No other hominoid employs this clenched-fist configuration, yet to us humans it feels very natural. A clenched fist is used in fighting styles practiced all over the world, and is universally recognized as a sign of aggression.
    ...
    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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  14. #54
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    Study: Human Evolution Forced by Chaotic Landscape
    Adversity breeds strength -- and perhaps human intelligence

    It's a widely held hypothesis that ecological and climatological changes had a crucial driving role in evolution throughout history. Now Penn State University geoscience professor Katherine Freeman and her graduate student, Clayton Magill, have put forth an intriguing study, which suggests that chaos in the ecosystem of East Africa drove mankind's ancestors to radically evolve 2 million years ago.
    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. #55
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    The Evolutionary Biology of Star Trek

    One of the big mysteries of human evolution is what happened to all the humans who shared the planet with Homo sapiens for hundreds of thousands of years. While Homo sapiens was evolving in Africa, there were also tool-making hominins in Europe and Asia, known as Homo erectus, the Denisovans, and the Neanderthals. And let's not even get started on Homo floresiensis, the so-called Hobbit people. Did all those human groups meet at some point? Did they interbreed or kill each other? Is it even appropriate to call them all human, or were some human and some animals?
    ...
    When Homo sapiens met the Neanderthals for the first time, would it have been like humans meeting the Klingons? Quite possibly, yes. Especially the part where they look slightly different and speak different languages, but are nevertheless able to have children together and engage in extensive trade back and forth (as well as having a war).
    ...
    http://io9.com/5976509/the-evolution...y-of-star-trek
    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. #56
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    Native Australians have had (carnal) knowledge of India
    Travelers from India also may have brought culture, and the dingo.

    http://arstechnica.com/science/2013/...edge-of-india/
    Wanted: An “extremely adventurous female human” to give birth to a Neandertal

    http://io9.com/5977197/wanted-an-ext...o-a-neandertal
    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. #57
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    Polynesians reached South America, picked up sweet potatoes, went home
    Tubers were spread from New Zealand to Hawaii before European contact.

    http://arstechnica.com/science/2013/...oes-went-home/
    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. #58
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    'Planet Earth' narrator David Attenborough calls humans a 'plague on the Earth'
    Famed nature broadcaster calls for population control to limit humanity's effect on the planet

    http://www.theverge.com/2013/1/23/39...-plague-on-the
    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. #59
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    No, George Church is not looking for “an extremely adventurous female human” to give birth to a Neanderthal

    Reports and headlines to the contrary, Ritter reports, stem from a misunderstood interview Church gave the German magazine Der Spiegel about his newly published book, Regenesis: How Synthetic Biology Will Reinvent Nature and Ourselves (a phenomenal read, btw):

    http://io9.com/5978295/no-george-chu...o-a-neandertal
    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. #60
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    The Bizarre Disappearance of the Peking Man Fossil

    Peking Man was first seen at an archaeological dig site in China the 1920s. He was last seen being loaded into some boxes in 1941, destined for the United States. The boxes disappeared, and no trace of them was ever found. Since then, many conspiracy theories have been swirling about the missing fossils.

    http://io9.com/5980372/the-bizarre-d...ing-man-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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