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Keyword: clovisimpact

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  • Evidence for an extraterrestrial impact 12,900 years ago

    09/30/2007 10:14:28 AM PDT · by baynut · 55 replies · 1,887+ views
    A carbon-rich black layer, dating to 12.9 ka, has been previously identified at 50 Clovis-age sites across North America and appears contemporaneous with the abrupt onset of Younger Dryas (YD) cooling. The in situ bones of extinct Pleistocene megafauna, along with Clovis tool assemblages, occur below this black layer but not within or above it. Causes for the extinctions, YD cooling, and termination of Clovis culture have long been controversial. In this paper, we provide evidence for an extraterrestrial (ET) impact event at 12.9 ka, which we hypothesize caused abrupt environmental changes that contributed to YD cooling, major ecological reorganization,...
  • Cosmic blast may have killed off megafauna Scientists say early humans doomed, too

    09/25/2007 6:45:11 PM PDT · by baynut · 52 replies · 1,333+ views
    Boston Globe ^ | September 27, 2007 | Colin Nickerson
    Wooly mammoths, giant sloths, saber-toothed cats, and dozens of other species of megafauna may have become extinct when a disintegrating comet or asteroid exploded over North America with the force of millions of hydrogen bombs, according to research by an international team of scientists. The blast, which the researchers believe occurred 12,900 years ago, may have also doomed a mysterious early human culture, known as Clovis people, while triggering a planetwide cool-down that wiped out the plant species that sustained many outsize Ice Age beasts, according to research published online yesterday in the Proceedings of the National Academy of Sciences.
  • Research Team Says Extraterrestrial Impact To Blame For Ice Age Extinctions (More)

    09/25/2007 12:58:19 PM PDT · by blam · 56 replies · 1,456+ views
    Eureka Alert ^ | Northern Arizona University - Lisa Nelson
    Contact: Lisa Nelson Lisa.Nelson@nau.edu 928-523-6123 Northern Arizona University Research team says extraterrestrial impact to blame for Ice Age extinctions A colorized scanning electron microscope image of a glassy carbon sphere that contains evidence of extraterrestrial impact. The sphere measures about .012 inches in width. What caused the extinction of mammoths and the decline of Stone Age people about 13,000 years ago remains hotly debated. Overhunting by Paleoindians, climate change and disease lead the list of probable causes. But an idea once considered a little out there is now hitting closer to home. A team of international researchers, including two Northern...
  • NSF Press Release: Comet May Have Exploded Over North America 13,000 Years Ago

    08/15/2007 5:32:04 PM PDT · by baynut · 49 replies · 2,218+ views
    National Science Foundation Press Release ^ | August 14, 2007 | Cheryl Dybas, NSF
    A "black mat" of algal growth in Arizona marks the extinction of mammoths 12,900 years ago New scientific findings suggest that a large comet may have exploded over North America 12,900 years ago, explaining riddles that scientists have wrestled with for decades, including an abrupt cooling of much of the planet and the extinction of large mammals. The discovery was made by scientists from the University of California at Santa Barbara and their colleagues. James Kennett, a paleoceanographer at the university, said that the discovery may explain some of the highly debated geologic controversies of recent decades. The period in...
  • Comet Theory Collides With Clovis Research, May Explain Disappearance of Ancient People

    08/03/2007 11:29:34 PM PDT · by ForGod'sSake · 122 replies · 4,803+ views
    June 28, 2007 Comet theory collides with Clovis research, may explain disappearance of ancient people A theory put forth by a group of 25 geo-scientists suggests that a massive comet exploded over Canada, possibly wiping out both beast and man around 12,900 years ago, and pushing the earth into another ice age. University of South Carolina archaeologist Dr. Albert Goodyear said the theory may not be such "out-of-this-world" thinking based on his study of ancient stone-tool artifacts he and his team have excavated from the Topper dig site in Allendale, as well as ones found in Georgia, North Carolina and...
  • Climate alarmists lose another piece of evidence

    06/11/2007 10:11:38 AM PDT · by Neville72 · 39 replies · 3,392+ views
    enterstageright ^ | 6/11/2007 | Dennis T. Avery
    Don't look now, but another big chunk of the "evidence" for man-made global warming suddenly disappeared. Poof! Researchers just reported that the world's most recent case of "abrupt climate change"—which occurred a mere 12,000 years ago—was probably due to a comet strike, not to "climate sensitivity." The Younger Dryas occurred as an Ice Age was ending. As the climate began to warm, a huge and sudden rush of fresh meltwater broke out from the Great Lakes and swept out to sea. The water surge was monumental enough that the meltwater lowered the salinity of the ocean, shut down the Atlantic...
  • Comet May Have Doomed Mammoths

    05/26/2007 6:12:53 AM PDT · by Renfield · 32 replies · 1,982+ views
    Red Orbit ^ | 5-26-07 | Betsy Mason
    mammoth some 12,900 years ago. A team of two dozen scientists say the culprit was likely a comet that exploded in the atmosphere above North America. The explosions sent a heat and shock wave across the continent, pelted the ground with a layer of telltale debris, ignited massive wildfires and triggered a major cooling of the climate, said nuclear analytic chemist Richard Firestone of Lawrence Berkeley Laboratory, one of the scientists who presented the controversial new theory Thursday at a conference of the American Geophysical Union in Acapulco. At least 15 species, mostly large mammals including mammoths, mastadons, giant ground...
  • Oregon Researchers Involved In New Clovis-Age Impact Theory (More)

    05/23/2007 2:30:19 PM PDT · by blam · 20 replies · 1,878+ views
    Contact: Jim Barlow jebarlow@uoregon.edu 541-346-3481 University of Oregon Oregon researchers involved in new Clovis-age impact theory Did a comet hit the Great Lakes region and fragment human populations 12,900 years ago? Two University of Oregon researchers are on a multi-institutional 26-member team proposing a startling new theory: that an extraterrestrial impact, possibly a comet, set off a 1,000-year-long cold spell and wiped out or fragmented the prehistoric Clovis culture and a variety of animal genera across North America almost 13,000 years ago. Driving the theory is a carbon-rich layer of soil that has been found, but not definitively explained, at...
  • Catastrophic Comet Chilled and Killed Ice Age Beasts (and Clovis people)

    05/21/2007 10:16:48 PM PDT · by TigerLikesRooster · 45 replies · 3,335+ views
    Live Science ^ | 05/21/07 | Jeanna Bryner
    Catastrophic Comet Chilled and Killed Ice Age Beasts Jeanna Bryner LiveScience Staff Writer LiveScience.com Mon May 21, 9:30 AM ET An extraterrestrial object with a three-mile girth might have exploded over southern Canada nearly 13,000 years ago, wiping out an ancient Stone Age culture as well as megafauna like mastodons and mammoths. The blast could be to blame for a major cold spell called the Younger Dryas that occurred at the end of the Pleistocene Epoch, a period of time spanning from about 1.8 million years ago to 11,500 years ago. Research, presented today at a meeting of the American...
  • Diamonds tell tale of comet that killed off the cavemen

    05/20/2007 4:50:33 PM PDT · by Renfield · 71 replies · 3,536+ views
    Guardian ^ | 5-20-07 | Robin McKie
    Fireballs set half the planet ablaze, wiping out the mammoth and America's Stone Age hunters Scientists will outline dramatic evidence this week that suggests a comet exploded over the Earth nearly 13,000 years ago, creating a hail of fireballs that set fire to most of the northern hemisphere. Primitive Stone Age cultures were destroyed and populations of mammoths and other large land animals, such as the mastodon, were wiped out. The blast also caused a major bout of climatic cooling that lasted 1,000 years and seriously disrupted the development of the early human civilisations that were emerging in Europe and...
  • Terrestrial Evidence of a Nuclear Catastrophe in Paleoindian Times

    07/24/2006 12:03:03 AM PDT · by ForGod'sSake · 276 replies · 7,633+ views
    Mammoth Trumpet ^ | March 2001 | Firestone/Topping
    Terrestrial Evidence of a Nuclear Catastrophe in Paleoindian Times by Richard B. Firestone & William Topping The Paleoindian occupation of North America, theoretically the point of entry of the first people to the Americas, is traditionally assumed to have occurred within a short time span beginning at about 12,000 yr B.P. This is inconsistent with much older South American dates of around 32,000 yr B.P.1 and the similarity of the Paleoindian toolkit to Mousterian traditions that disappeared about 30,000 years ago.2. A pattern of unusually young radiocarbon dates in the Northeast has been noted by Bonnichsen and Will.3,4 Our research...
  • Did comet start deadly cold snap?

    05/16/2007 3:00:33 PM PDT · by Mike Darancette · 84 replies · 4,671+ views
    Canada.com ^ | Monday, May 14, 2007 | Margaret Munro
    An extraterrestrial impact 13,000 years ago wiped out mammoths and started a mini-ice age, scientists believe Margaret Munro CanWest News Service Monday, May 14, 2007 A comet or some other extraterrestrial object appears to have slammed into northern Canada 12,900 years ago and triggered an abrupt and catastrophic climate change that wiped out the mammoths and many other prehistoric creatures, according to a team of U.S. scientists. Evidence of the ecological disaster exists in a thin layer of sediment that has been found from Alberta to New Mexico, say the researchers, whose work adds a dramatic and provocative twist to...
  • Scientist: Comets Blasted Early Americans

    10/28/2005 6:33:11 PM PDT · by NormsRevenge · 48 replies · 1,824+ views
    ap on Yahoo ^ | 10/28/05 | Meg Kinnard - ap
    COLUMBIA, S.C. - A supernova could be the "quick and dirty" explanation for what may have happened to an early North American culture, a nuclear scientist here said Thursday. Richard Firestone said at the "Clovis in the Southeast" conference that he thinks "impact regions" on mammoth tusks found in Gainey, Mich., were caused by magnetic particles rich in elements like titanium and uranium. This composition, the Lawrence Berkeley National Laboratory scientist said, resembles rocks that were discovered on the moon and have also been found in lunar meteorites that fell to Earth about 10,000 years ago. Firestone said that, based...
  • Supernova Storm Wiped Out Mammoths?

    10/17/2005 8:57:32 AM PDT · by Fzob · 110 replies · 12,216+ views
    Discovery News ^ | Sept. 28, 2005 | Jennifer Viegas
    Sept. 28, 2005— A supernova blast 41,000 years ago started a deadly chain of events that led to the extinction of mammoths and other animals in North America, according to two scientists. If their supernova theory gains acceptance, it could explain why dozens of species on the continent became extinct 13,000 years ago. Mammoths and mastodons, both relatives of today's elephants, mysteriously died out then, as did giant ground sloths, a large-horned bison, a huge species of armadillo, saber-toothed cats, and many other animals and plants. Richard Firestone, a nuclear scientist at the U.S. Department of Energy's Lawrence Berkeley National...
  • Supernova Storm Wiped Out Mammoths?

    10/04/2005 11:47:27 PM PDT · by planetesimal · 84 replies · 3,723+ views
    Discovery News ^ | 09/28/05 | Jennifer Viegas
    A supernova blast 41,000 years ago started a deadly chain of events that led to the extinction of mammoths and other animals in North America, according to two scientists. If their supernova theory gains acceptance, it could explain why dozens of species on the continent became extinct 13,000 years ago.
  • Supernova debris found on Earth

    11/24/2004 1:22:08 PM PST · by Phsstpok · 64 replies · 7,836+ views
    NEWS@NATURE.COM ^ | 02 November 2004 | Mark Peplow
    Published online: 02 November 2004; | doi:10.1038/news041101-5 Supernova debris found on Earth Mark Peplow Ancient explosion may have affected climate and, possibly, human evolution. Cosmic fallout from an exploding star dusted the Earth about 2.8 million years ago, and may have triggered a change in climate that affected the course of human evolution. The evidence comes from an unusual form of iron that was blasted through space by a supernova before eventually settling into the rocky crust beneath the Pacific Ocean. Gunther Korschinek, a physicist from the Technical University of Munich in Germany, leads a team who in 1999 found...
  • Al Goodyear And The Secrets Of Ancient Americans

    05/15/2008 3:25:21 PM PDT · by blam · 29 replies · 382+ views
    Free Times ^ | 5-14/20-2008 | Ron Aiken
    Al Goodyear and the Secrets of the Ancient AmericansUSC Professor Discovers 50,000 Year-Old Artifacts in S.C. BY RON AIKEN It was the summer of 1998, and University of South Carolina archaeologist Al Goodyear had a problem on his hands. Fourteen years of digging at an ancient chert quarry outside Allendale had begun to bear fruit: At a site called Big Pine Tree, Goodyear was well on his way to establishing that a substantial Clovis population lived here. If you’ll recall your history lessons from high school, the Clovis people — named such because the first evidence of them was found...
  • Scientists find signs of 13,000-year-old extinction event

    01/01/2009 2:09:17 PM PST · by neverdem · 79 replies · 3,658+ views
    Chicago Tribune ^ | January 2, 2009 | Robert Mitchum
    Comet may have exploded over planet, causing fires, die-offs, researchers say A meteorite colliding with the Earth 65 million years ago is considered to be the most likely reason dinosaurs vanished from the planet. Now a team of scientists says it has found new evidence that an object from space caused a similar extinction event only 13,000 years ago. In an article to be published Friday in the journal Science, researchers present what one author calls the "smoking bullet"—proof that an exploding comet triggered the sudden, thousand-year freeze that killed off mammoths, saber-toothed tigers and other large mammals that used...
  • Exploding Asteroid Theory Strengthened By New Evidence Located In Ohio, Indiana

    07/02/2008 3:27:51 PM PDT · by blam · 68 replies · 1,699+ views
    Physorg ^ | 7-1-2008 | University of Cincinnati
    Exploding asteroid theory strengthened by new evidence located in Ohio, Indiana Space & Earth science / Earth Sciences Ken Tankersley seen working in the field in a cave in this publicity photo from the National Geographic Channel. Geological evidence found in Ohio and Indiana in recent weeks is strengthening the case to attribute what happened 12,900 years ago in North America -- when the end of the last Ice Age unexpectedly turned into a phase of extinction for animals and humans -- to a cataclysmic comet or asteroid explosion over top of Canada. A comet/asteroid theory advanced by Arizona-based geophysicist...
  • Fungi, Feces Show Comet Didn't Kill Ice Age Mammals?

    06/24/2010 8:43:43 AM PDT · by Palter · 18 replies
    National Geographic ^ | 22 June 2010 | John Roach
    Tiny balls of fungus and feces may disprove the theory that a huge space rock exploded over North America about 12,900 years ago, triggering a thousand-year cold snap, according to a new study. The ancient temperature drop, called the Younger Dryas, has been well documented in the geologic record, including soil and ice core samples.The cool-down also coincides with the extinction of mammoths and other Ice Age mammals in North America, and it's thought to have spurred our hunter-gatherer ancestors in the Middle East to adopt an agricultural lifestyle.But the theory that a comet or asteroid explosion is behind the...