Keyword: speciation

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  • Asperger’s Man- The Search for Multi-Regional Human Speciation

    08/30/2012 10:45:34 AM PDT · by EveningStar · 11 replies
    The Freehold | August 29-30, 2012 | Jonathan David Baird
    My first love will always be archaeology and the study of what makes us human.This article is speculation. This is my personal musing on the development of certain psychological and physiological human traits. This is not to be taken as anything but my personal opinion. I have no evidence that there was an Asperger’s man. This article was also written several years ago and since then more evidence for the possibility of interbreeding with other hominids has come to light in Russia and in Africa that may support my original idea... Part 1Part 2
  • Wired: “Birth of New Species Witnessed by Scientists”

    11/21/2009 9:59:49 AM PST · by GodGunsGuts · 99 replies · 3,140+ views
    AiG ^ | November 21, 2009
    Scientists have watched as a new species is “born”—or is that “evolved”?—on one of the Galapagos Islands, home of Darwin’s famous finches...
  • Speciation and the Animals on the Ark

    04/15/2009 8:21:59 PM PDT · by GodGunsGuts · 25 replies · 870+ views
    ICR ^ | April 2009 | Daniel Criswell, Ph.D.
    Speciation and the Animals on the Ark by Daniel Criswell, Ph.D.* Many people who use biological data to support an old-earth position believe that the appearance of millions of animal species does not support a young earth interpretation of creation. Nor do they think that a recent global Flood would support the existence of a great number of animals today if Noah only took two of each kind on the Ark. However, the science of how speciation occurs, and the definition of a species versus the biblical kind, does explain how many variations of the same kind of animal can...
  • Old fish, new fish, red fish, blue fish cichlid fish appear to be splitting into two species

    10/01/2008 7:22:16 PM PDT · by Soliton · 24 replies · 731+ views
    Science Daily ^ | October 1st, 2008
    Some cichlid fish see red better while others only have eyes for blue. This difference in vision, observed in fish in an African lake, could be pushing red-bodied cichlids to branch off from their blue-bodied brethren and to form a new species. If so, it would be the first time that scientists have caught evolution in the act of creating a new species because of changes in sense organs. For one species to diverge into two, some barrier must prevent two groups of individuals from interbreeding. Physical separation of two groups and changes to reproductive organs are two of the...
  • Human race will 'split into two different species'

    10/28/2007 7:11:09 AM PDT · by Bringbackthedraft · 59 replies · 188+ views
    Daily Mail ^ | 26th October 2007 | NIALL FIRTH
    The human race will one day split into two separate species, an attractive, intelligent ruling elite and an underclass of dim-witted, ugly goblin-like creatures, according to a top scientist. 100,000 years into the future, sexual selection could mean that two distinct breeds of human will have developed.
  • New Definition of 'Species' Could Aid Species Identification

    08/24/2006 6:54:24 AM PDT · by PatrickHenry · 88 replies · 1,087+ views
    PhysOrg.com ^ | 23 August 2006 | Staff
    Scientists at Texas Tech University argue that defining mammalian species based on genetics will result in the recognition of many more species than previously thought present. This has profound implications for our knowledge of biodiversity and issues based on it, such as conservation, ecology, and understanding evolution. Their study is published in the latest Journal of Mammalogy. The classical definition of species was proposed by Ernst Mayr in 1942, defining it as reproductively isolated groups of organisms. According to this study, the problem with applying this concept is that it is hard to observe mating and to know whether there...
  • Evolution in action? African fish could be providing rare example of forming two separate species

    06/02/2006 11:35:07 AM PDT · by PatrickHenry · 950 replies · 7,705+ views
    Cornell University ^ | 01 June 2006 | Sara Ball
    Avoiding quicksand along the banks of the Ivindo River in Gabon, Cornell neurobiologists armed with oscilloscopes search for shapes and patterns of electricity created by fish in the water. They know from their previous research that the various groups of local electric fish have different DNA, different communication patterns and won't mate with each other. However, they now have found a case where two types of electric signals come from fish that have the same DNA. The researchers' conclusion: The fish appear to be on the verge of forming two separate species. "We think we are seeing evolution in action,"...
  • Some Species Evolve Side by Side [palms & fish]

    02/14/2006 11:21:06 AM PST · by PatrickHenry · 127 replies · 1,604+ views
    Discovery.com (not Discovery Institute) ^ | 14 February 2006 | Larry O'Hanlon
    Modern genetics has uncovered new species evolving in situations that would even impress Darwin. The current journal Nature features two different cases — involving palm trees and lake fish — in which genetics have shown single species splitting into two new species while living side by side. The most common sort of evolution is thought to happen when different groups of the same species are separated by some physical barrier, and then adapt to different environments without any chance of interbreeding. Eventually the populations diverge and adapt to differing lifestyles so much they can't successfully interbreed. That's what biologists call...
  • Scientists 'see new species born'

    11/20/2005 9:27:40 AM PST · by restornu · 444 replies · 3,376+ views
    BBC News Online science editor ^ | 2004 June | By Dr David Whitehouse
    Scientists at the University of Arizona may have witnessed the birth of a new species. Biologists Laura Reed and Prof Therese Markow made the discovery by observing breeding patterns of fruit flies that live on rotting cacti in deserts. The work could help scientists identify the genetic changes that lead one species to evolve into two species. The research is published in the Proceedings of the National Academy of Sciences. One becomes two Whether the two closely related fruit fly populations the scientists studied - Drosophila mojavensis and Drosophila arizonae - represent one species or two is still debated...
  • Picky female frogs drive evolution of new species in less than 8,000 years

    11/02/2005 10:54:52 AM PST · by PatrickHenry · 346 replies · 3,983+ views
    UC Berkeley News Center ^ | 27 October 2005 | Robert Sanders
    Picky female frogs in a tiny rainforest outpost of Australia have driven the evolution of a new species in 8,000 years or less, according to scientists from the University of Queensland, the University of California, Berkeley, and the Queensland Parks and Wildlife Service. "That's lightning-fast," said co-author Craig Moritz, professor of integrative biology at UC Berkeley and director of the Museum of Vertebrate Zoology. "To find a recently evolved species like this is exceptional, at least in my experience." The yet-to-be-named species arose after two isolated populations of the green-eyed tree frog reestablished contact less than 8,000 years ago and...
  • The Problem With Evolution

    09/26/2005 5:44:09 AM PDT · by DARCPRYNCE · 340 replies · 6,041+ views
    ChronWatch ^ | 09/25/05 | Edward L. Daley
    Charles Darwin, the 19th century geologist who wrote the treatise 'The Origin of Species, by means of Natural Selection' defined evolution as "descent with modification". Darwin hypothesized that all forms of life descended from a common ancestor, branching out over time into various unique life forms, due primarily to a process called natural selection. However, the fossil record shows that all of the major animal groups (phyla) appeared fully formed about 540 million years ago, and virtually no transitional life forms have been discovered which suggest that they evolved from earlier forms. This sudden eruption of multiple, complex organisms is...
  • Butterfly unlocks evolution secret

    07/24/2005 6:30:18 PM PDT · by general_re · 1,355 replies · 14,997+ views
    BBC ^ | 24 July, 2005 | Julianna Kettlewell
    Why one species branches into two is a question that has haunted evolutionary biologists since Darwin. Given our planet's rich biodiversity, "speciation" clearly happens regularly, but scientists cannot quite pinpoint the driving forces behind it. Now, researchers studying a family of butterflies think they have witnessed a subtle process, which could be forcing a wedge between newly formed species. The team, from Harvard University, US, discovered that closely related species living in the same geographical space displayed unusually distinct wing markings. These wing colours apparently evolved as a sort of "team strip", allowing butterflies to easily identify the species of...
  • Desert Island: How climate can promote speciation

    06/20/2005 8:24:58 AM PDT · by PatrickHenry · 18 replies · 627+ views
    Scientific American ^ | 20 June 2005 | Kate Wong
    A bedrock tenet of biogeography holds that organisms separated from their ancestral population will set off on their own evolutionary trajectory. Continental drift provides one such isolating mechanism, illustrated perhaps most spectacularly by the unique flora and fauna found on the island of Madagascar, which broke off from the southern supercontinent of Gondwana some 90 million years ago. Mountain upheaval and river formation can also divide populations. But a new study reveals that the barriers need not be physical. Paleontologists have unearthed fossils of giant amphibians that indicate that climate, too, can effectively isolate organisms and thereby foster endemism. In...
  • Scientists Trace Corn Ancestry from Ancient Grass to Modern Crop

    06/15/2005 9:41:56 AM PDT · by PatrickHenry · 138 replies · 1,932+ views
    National Science Foundation ^ | 27 May 2005 | Staff
    Researchers have identified corn genes that were preferentially selected by Native Americans during the course of the plant's domestication from its grassy relative, teosinte, (pronounced "tA-O-'sin-tE") to the single-stalked, large-eared plant we know today. The study revealed that of the 59,000 total genes in the corn genome, approximately 1,200 were preferentially targeted for selection during its domestication. The study, by University of California, Irvine's Brandon Gaut and his colleagues, appears in the May 27 issue of the journal, Science. Understandably, a primary goal of teosinte domestication was to improve the ear and its kernels. A teosinte ear is only 2...
  • Odd fly uncovers evolution secret [speciation]

    04/20/2005 5:17:33 PM PDT · by PatrickHenry · 166 replies · 2,276+ views
    BBC News ^ | 20 April 2005 | Staff
    A unique fly from the Canary Islands has helped shed light on one driving force behind the birth of new species, Nature magazine reports this week. The robber fly is found nowhere else, and scientists speculate that the rich biodiversity on the islands may actually have led to its emergence. The researchers think sharing an island with a myriad of other lifeforms may push one species to evolve into another. This new theory adds fresh insight into how biodiversity arises. "Why some areas contain greater species diversity than others has been a fundamental question in evolutionary ecology and conservation biology,"...
  • Chromosomal Disharmony Leads to the Formation of a New Species

    02/26/2005 3:20:33 PM PST · by furball4paws · 96 replies · 1,481+ views
    furball4paws
    In 1927, Karpechenko made a hybrid of the common radish, Raphanus sativus, and cabbage, Brassica oleracea. Each parent has a diploid chromosome number of 2N=18. The hybrid also had 18 chromosomes, but because normal sperm and eggs could not be formed, the hybrid was sterile, as is common in such cases. However, some of the "sterile" hybrids produced a few viable seeds. These seeds were produced when the chromosome number spontaneously doubled. The doubling permitted the pairing of partner chromosomes and the formation of gametes with 1N=18. Karpechenko witnessed the birth of a new species in the passage of only...
  • Laboratory Speciation in Helianthus Evolves a Native Species

    02/15/2005 7:12:00 AM PST · by furball4paws · 163 replies · 2,511+ views
    furball4paws
    Laboratory Speciation in Helianthus Evolves a Native Species DNA examination of five species of Helianthus (H. annuus, H. petiolarus fallax, H. anomalus, H. paradoxus, and H. deserticola) suggested that H. annuus and H. petiolarus fallax are the evolutionary parents of the other three species (Rieseberg 1993, 1995, 1993). All five species are self-incompatible and fertile. Typically, H. annuus (the ancestor of the commercial sunflower) and H. petiolarus fallax form hybrids that are almost fully sterile. However, the few fertile hybrids, when subjected to sib-matings and back crossing regimes yield a new species that is fully fertile and cannot cross with...
  • Female crickets choosey with their mates [Hawaiian cricket is world's fastest-evolving invertebrate]

    02/06/2005 5:48:12 AM PST · by snarks_when_bored · 75 replies · 3,201+ views
    Lehigh University ^ | February 3, 2005 | Kurt Pfitzer
     Female crickets choosey with their mates Lehigh and U. of Maryland biologists have found that speedy speciation curtails courtship options for the Laupala crickets of Hawaii’s forests. Biologists at Lehigh University and the University of Maryland have identified a cricket living in Hawaii’s forests as the world’s fastest-evolving invertebrate. Finicky mating behavior appears to be the driving force behind the speedy speciation of the Laupala cricket, the scientists wrote in the Jan. 27 issue of Nature magazine. Females in the Laupala genus detect tiny differences in the pulse rates of male courtship songs, which differ from one Laupala species to...
  • Snakes bite back at poison toads [evolution happening now in Australia]

    12/11/2004 11:50:10 PM PST · by snarks_when_bored · 46 replies · 3,941+ views
    BBC ^ | December 8, 2004
    Snakes bite back at poison toads Snakes in Australia have evolved to counter the threat of invasive, poisonous cane toads, scientists have found. The toads ( Bufo marinus ) were only introduced in the 1930s but have already overwhelmed the local wildlife in Queensland with their rapid reproduction and toxic flesh, which kills many predators foolish enough to make them a meal. But for two species of snake, at least, natural selection has produced a defence: the snakes have developed relatively smaller heads and longer bodies. In essence, the reduced gape of the animals limits their ability to eat the...
  • Species form when fish booted out of home [Speciation]

    08/23/2004 6:06:04 PM PDT · by PatrickHenry · 38 replies · 1,018+ views
    ABC Science Online ^ | 24 August 2004 | Anna Salleh
    Being kicked out of its coral home may have forced the evolution of a new species of fish, say Australian scientists. Research published in today's issue of the journal Current Biology provides more support for the idea that geographic isolation is not always needed for new species to develop. Marine biologist, Dr Philip Munday of James Cook University in Townsville and team studied a new species of coral-dwelling goby fish found in southern Papua New Guinea to try and see how it evolved. The most established doctrine of how new species form is that a group of organisms becomes separated...
  • Study Suggests Humans Can Speed Evolution

    08/05/2004 8:29:50 AM PDT · by AdmSmith · 57 replies · 924+ views
    Georgia Inst of Technology ^ | August 4, 2004 | David Terraso
    Atlanta (August 4,2004)It's no secret that life in the 21st century moves at a rapid pace. Human inventions such as the Internet, mobile phones and fiber optic cable have increased the speed of communication, making it possible for someone to be virtually in two places at once. But can humans speed up the rate of one of nature's most basic and slowest processes, evolution? A study by J. Todd Streelman, new assistant professor of biology at the Georgia Institute of Technology suggests that humans may have sped up the evolutionary clock for one species of fish. Cichlid fish are well...
  • Parting Genomes: UA Biologists Discover Seeds of Speciation [Happening as they observe!]

    06/08/2004 3:30:58 AM PDT · by PatrickHenry · 99 replies · 446+ views
    University of Arizona ^ | 07 June 2004 | Paul Muhlrad
    The first eyewitness to the birth of a new species may be a University of Arizona graduate student. Her new findings could help biologists identify and understand the precise genetic changes that lead one species to evolve into two separate species. Laura K. Reed and her advisor Therese Markow, a UA Regents' Professor, made the discovery by observing breeding patterns of fruit flies that live on rotting cacti in western deserts. Whether the closely related fruit fly populations, designated Drosophila mojavensis and Drosophila arizonae, represent one species or two is still debated by biologists, testament to the UA researchers’ assertion...
  • Changing One Gene Launches New Fly Species

    12/09/2003 7:47:21 AM PST · by PatrickHenry · 269 replies · 905+ views
    Science Daily ^ | 08 December 2003 | Staff
    In what has been described as the "perfect experiment," evolutionary biologists at the University of Chicago replaced a single gene in fruit flies and discovered a mechanism by which two different "races" begin to become different species, with one group adapted to life in the tropics and the other suited to cooler climates. The tropical group was more tolerant of starvation but less tolerant of cold. The temperate group was less able to resist starvation but better adapted to cool weather. The altered gene also changed the flies' pheromones, chemical signals that influence mating behavior. As a result, the researchers...
  • Pre-Darwin evolution idea emerges

    10/16/2003 10:36:26 AM PDT · by inPhase · 47 replies · 511+ views
    The Globe and Mail ^ | Thursday, October 16, 2003 | STEPHEN STRAUSS
    Scottish scientist had floated similar theory in 1794 but few noticed Charles Darwin's landmark theory of evolution, described in The Origin of Species in 1859, was anticipated 65 years earlier by a scientist living and working in Edinburgh, newly published research says. Unfortunately, prescient geologist James Hutton wrote in a nearly impenetrable literary style and buried what would later turn out to be revolutionary concepts in a 10-page chapter in a 2,250-page book. Mr. Hutton has been called the "founder of modern geology" because he was the first to say geological records showed that the earth was millions and not...
  • Scientists: Amazon 'Mystery' Fish Is a New Species

    07/03/2003 9:37:36 PM PDT · by StupidQuestions · 1 replies · 148+ views
    Reuters ^ | Reuters.com
    Thu July 3, 2003 01:59 PM ET SAO PAULO, Brazil (Reuters) - Scientists in Brazil's Amazon say they have discovered a new fish, something that has not happened for more than a century, and hope to categorize the small eel-like creature by the end of the year. "It's a new species which will require us to create a new genus and a whole new family to accommodate it," Jansen Zuanon, head aquatic biology researcher at Brazil's National Amazon Research Institute, or Inpa, told Reuters on Thursday.