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Keyword: toba

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  • Ancient drought 'changed history'

    12/08/2005 3:58:46 AM PST · by TigerLikesRooster · 42 replies · 1,607+ views
    BBC ^ | 12/07/05 | Roland Pease
    Ancient drought 'changed history' By Roland Pease BBC science unit, San Francisco The sediments are an archive of past climate conditions Scientists have identified a major climate crisis that struck Africa about 70,000 years ago and which may have changed the course of human history.The evidence comes from sediments drilled up from the beds of Lake Malawi and Tanganyika in East Africa, and from Lake Bosumtwi in Ghana. It shows equatorial Africa experienced a prolonged period of drought. It is possible, scientists say, this was the reason some of the first humans left Africa to populate the globe. Certainly,...
  • Star Blasted Through Solar System 70,000 Years Ago

    02/18/2015 1:11:46 PM PST · by BenLurkin · 113 replies
    discovery.com ^ | Ian O'Neill
    Highlighted by astronomers at the University of Rochester and the European Southern Observatory, the star — nicknamed “Scholz’s star” — has a very low tangential velocity in the sky, but it has been clocked traveling at a breakneck speed away from us. In other words, from our perspective, Scholz’s star is fleeing the scene of a collision with us. “Most stars this nearby show much larger tangential motion,” said Eric Mamajek, of the University of Rochester. “The small tangential motion and proximity initially indicated that the star was most likely either moving towards a future close encounter with the solar...
  • DNA analysis shakes up Neandertal theories

    04/06/2012 10:21:33 PM PDT · by SunkenCiv · 31 replies
    Binghamton.edu ^ | April 4, 2012 | Gail Glover
    Focusing on mitochondrial DNA sequences from 13 Neandertal individuals, including a new sequence from the site of Valdegoba cave in northern Spain, the research team found some surprising results. When they started looking at the DNA, a clear pattern emerged. Neandertal individuals from Western Europe that were older than 50,000 years and individuals from sites in western Asia and the Middle East showed a high degree of genetic variation, on par with what might be expected from a species that had been abundant in an area for a long period of time. In fact, the amount of genetic variation was...
  • Indian DNA Links To 6 'Founding Mothers'

    03/13/2008 2:04:39 PM PDT · by blam · 72 replies · 1,801+ views
    Yahoo News/AP ^ | 3-13-2008 | Malcom Ritter
    Indian DNA links to 6 'founding mothers' By MALCOLM RITTER, AP Science Writer NEW YORK - Nearly all of today's Native Americans in North, Central and South America can trace part of their ancestry to six women whose descendants immigrated around 20,000 years ago, a DNA study suggests. Those women left a particular DNA legacy that persists to today in about 95 percent of Native Americans, researchers said. The finding does not mean that only these six women gave rise to the migrants who crossed into North America from Asia in the initial populating of the continent, said study co-author...
  • Modern Humans in India Earlier Than Previously Thought?

    09/15/2013 4:57:07 PM PDT · by SunkenCiv · 18 replies
    Popular Archaeology ^ | Sat, Sep 14, 2013 | editors
    "We found the very first evidence for archaeological assemblages in association with the Toba ash", says Petraglia. "We found Middle Palaeolithic assemblages below and above the ash indicating the technologies being used at the time of the event. When the stone tool assemblages were analyzed from contexts above and below the ash, we found that they were very similar........We therefore concluded that the Middle Palaeolithic hominins survived the eruption and there was population continuity. This is not what would have been expected based on general theories that the Toba super-eruption decimated populations." Moreover, similar findings published by Christine Lane, et...
  • JOURNEY OF MANKIND (The Peopling Of The World)

    04/25/2005 5:11:40 PM PDT · by blam · 41 replies · 1,838+ views
    The Bradshaw Foundation ^ | Unknown | Stephen Oppenheimer
    This is the result of a DNA study done by Professor Stephen Oppenheimer and funded by The Bradshaw Foundation. As you go on the journey, here are some things I would like you to make note of and I would appreciate your comments:1. 135-115,000 years ago, notice that the first human excursion out of Africa failed/Died out.2. 74,000 years ago Toba exploded and reduced the worldwide human population to 2-10,000. Note the (about) 10,000 year absence of humans in India, Pakistan and parts of SE Asia. Also, there are two populations of 'out of Africa' humans that are seperated from...
  • Archaeogenetic research refutes earlier findings

    06/13/2013 7:27:12 PM PDT · by SunkenCiv · 25 replies
    University of Huddersfield ^ | Monday, June 10, 2013 | unattributed (press release)
    ...a team of archaeologists excavating in India then claimed to have found evidence that modern humans were there before the eruption possibly as early as 120,000 years ago, much earlier than Europe or the Near East were colonised. These findings, based on the discovery of stone tools below a layer of Toba ash, were published in Science in 2007. Now Professor Richards working principally with the archaeologist Professor Sir Paul Mellars, of the University of Cambridge and the University of Edinburgh, with a team including Huddersfield University s Dr Martin Carr and colleagues from York and Porto has published his...
  • Toba super-volcano catastrophe idea 'dismissed'

    05/02/2013 7:34:42 PM PDT · by SunkenCiv · 19 replies
    BBC News ^ | Jonathan Amos
    The idea that humans nearly became extinct 75,000 ago because of a super-volcano eruption is not supported by new data from Africa, scientists say. In the past, it has been proposed that the so-called Toba event plunged the world into a volcanic winter, killing animal and plant life and squeezing our species to a few thousand individuals. An Oxford University-led team examined ancient sediments in Lake Malawi for traces of this climate catastrophe. It could find none... Researchers estimate some 2,000-3,000 cubic kilometres of rock and ash were thrown from the volcano when it blew its top on what is...
  • Ancient Supervolcano Affected the Ends of the Earth

    11/08/2012 6:20:32 PM PST · by SunkenCiv · 28 replies
    LiveScience ^ | November 5, 2012 | Staff
    About 74,000 years ago, the Toba volcano on the Indonesian island of Sumatra erupted with catastrophic force. Estimated to be 5,000 times larger than the 1980 eruption of Mount St. Helens, it is believed to be the largest volcanic event on Earth in the last 2 million years. Toba spewed enough lava to build two Mount Everests, it produced huge clouds of ash that blocked sunlight for years, and it the left behind a crater 31 miles (50 kilometers) across. The volcano even sent enough sulphuric acid into the atmosphere to create acid rain downpours in the Earth's polar regions,...
  • Study: Humans Almost Went Extinct 70,000 Years Ago

    04/24/2008 12:07:36 PM PDT · by Sopater · 67 replies · 754+ views
    Fox News ^ | Thursday, April 24, 2008 | AP
    WASHINGTON — Human beings may have had a brush with extinction 70,000 years ago, an extensive genetic study suggests. The human population at that time was reduced to small isolated groups in Africa, apparently because of drought, according to an analysis released Thursday. The report notes that a separate study by researchers at Stanford University estimated the number of early humans may have shrunk as low as 2,000 before numbers began to expand again in the early Stone Age.
  • Study Says Near Extinction Threatened People

    04/24/2008 2:05:33 PM PDT · by blam · 56 replies · 143+ views
    Physorg ^ | 4-24-2008 | RANDOLPH E. SCHMID
    Study says near extinction threatened people By RANDOLPH E. SCHMID, AP WriterApril 24,2008 (AP) -- Human beings may have had a brush with extinction 70,000 years ago, an extensive genetic study suggests. The human population at that time was reduced to small isolated groups in Africa, apparently because of drought, according to an analysis released Thursday. The report notes that a separate study by researchers at Stanford University estimated the number of early humans may have shrunk as low as 2,000 before numbers began to expand again in the early Stone Age. "This study illustrates the extraordinary power of genetics...
  • Secrets Revealed Behind Supervolcano Eruption

    03/10/2007 8:19:17 AM PST · by aculeus · 56 replies · 1,735+ views
    Red Orbit ^ | March 5, 2007 | Unsigned
    Researchers at Rensselaer Polytechnic Institute have discovered what likely triggered the eruption of a "supervolcano" that coated much of the western half of the United States with ash fallout 760,000 years ago. Using a new technique developed at Rensselaer, the team determined that there was a massive injection of hot magma underneath the surface of what is now the Long Valley Caldera in California some time within 100 years of the gigantic volcano’s eruption. The findings suggest that this introduction of hot melt led to the immense eruption that formed one of the world’s largest volcanic craters or calderas. The...
  • Chinese challenge to 'out of Africa' theory

    11/10/2009 8:39:50 PM PST · by TigerLikesRooster · 49 replies · 1,553+ views
    New Scientist ^ | 11/03/09 | Phil McKenna
    Chinese challenge to 'out of Africa' theory 00:01 03 November 2009 by Phil McKenna The discovery of an early human fossil in southern China may challenge the commonly held idea that modern humans originated out of Africa. Jin Changzhu and colleagues of the Institute of Vertebrate Palaeontology and Palaeoanthropology in Beijing, announced to Chinese media last week that they have uncovered a 110,000-year-old putative Homo sapiens jawbone from a cave in southern China's Guangxi province.
  • Huge Eruption May Have Been Bigger (Super-Volcano)

    12/23/2006 3:54:50 PM PST · by blam · 99 replies · 2,644+ views
    Discovery Channel ^ | 12-21-2006 | Larry O'Hanlon
    Eruption May Have Been Bigger Larry O'Hanlon, Discovery News Dec. 21, 2006 — One of the largest volcanic eruptions on record just got bigger. The Taupo Volcanic Zone of New Zealand appears to have had twin eruptions only 20 miles apart within days of each other a quarter-million years ago. Each eruption belched out more than 25 cubic miles (100 cubic kilometers) of rock and volcanic ash. This is the first evidence of twin supervolcanic eruptions. "It's possible one of these triggered the other," said geologist Darren Gravley of the University of Auckland, New Zealand. But exactly how the...
  • This Is the Way the World Ends? Volcanoes Could Darken World

    06/06/2012 7:25:44 PM PDT · by presidio9 · 59 replies
    ABC News ^ | June 6, 2012 | LEE DYE
    Are you worried about the end of life as we know it? Then don't just look to the sky for that catastrophic asteroid that could be heading our way. The end may come from right beneath your feet. Super-volcanoes have probably caused more extinctions than asteroids. But until now it has been thought that these giant volcanoes took thousands of years to form -- and would remain trapped beneath the earth's crust for thousands more years -- before having much effect on the planet. But new research indicates these catastrophic eruptions, possibly thousands of times more powerful than the 1980...
  • Ice Cores Unlock Climate Secrets

    06/09/2004 3:27:33 PM PDT · by blam · 76 replies · 487+ views
    BBC ^ | 6-9-2004 | Julianna Kettlewell
    Ice cores unlock climate secrets By Julianna Kettlewell BBC News Online science staff Tiny bubbles of ancient air are locked in the ice Global climate patterns stretching back 740,000 years have been confirmed by a three kilometre long ice core drilled from the Antarctic, Nature reports. Analysis of the ice proves our planet has had eight Ice Ages during that period, punctuated by rather brief warm spells - one of which we enjoy today. If past patterns are followed in the future, we can expect our "mild snap" to last another 15,000 years. The data may also help predict how...
  • "Super volcano" could dwarf Indonesia's earthquake catastrophes: expert

    04/01/2005 3:01:49 PM PST · by DannyTN · 147 replies · 5,263+ views
    Yahoo News ^ | 4/1/05 | AFP
    "Super volcano" could dwarf Indonesia's earthquake catastrophes: expert Fri Apr 1,12:21 AM ET Science - AFP SYDNEY (AFP) - As Indonesians struggled to recover from the second deadly earthquake to strike them in three months, an Australian expert warned the country faced the prospect of a "super volcano" eruption that would dwarf all previous catastrophes. AFP/File Photo Professor Ray Cas of Monash University's School of Geosciences said the world's biggest super volcano was Lake Toba, on Indonesia's island of Sumatra, site of both the recent massive earthquakes. Cas told Australian media Friday that Toba sits on a faultline running down...
  • 'Pompeii-Like' Excavations Tell Us More About Toba Super-Eruption

    03/04/2010 7:13:24 PM PST · by SunkenCiv · 16 replies · 666+ views
    ScienceDaily ^ | March 3, 2010 | University of Oxford
    Newly discovered archaeological sites in southern and northern India have revealed how people lived before and after the colossal Toba volcanic eruption 74,000 years ago... The seven-year project examines the environment that humans lived in, their stone tools, as well as the plants and animal bones of the time. The team has concluded that many forms of life survived the super-eruption, contrary to other research which has suggested significant animal extinctions and genetic bottlenecks. According to the team, a potentially ground-breaking implication of the new work is that the species responsible for making the stone tools in India was Homo...
  • Ancient Volcano's Devastating Effects Confirmed (Toba eruption and the following Ice Age)

    12/04/2009 3:08:19 PM PST · by NormsRevenge · 30 replies · 1,018+ views
    LiveScience.com ^ | 12/4/09 | LiveScience Staff
    A massive volcanic eruption that occurred in the distant past killed off much of central India's forests and may have pushed humans to the brink of extinction, according to a new study that adds evidence to a controversial topic. The Toba eruption, which took place on the island of Sumatra in Indonesia about 73,000 years ago, released an estimated 800 cubic kilometers of ash into the atmosphere that blanketed the skies and blocked out sunlight for six years. In the aftermath, global temperatures dropped by as much as 16 degrees centigrade (28 degrees Fahrenheit) and life on Earth plunged deeper...
  • Supervolcano eruption -- in Sumatra -- deforested India 73,000 years ago

    11/23/2009 12:23:04 PM PST · by decimon · 25 replies · 1,390+ views
    CHAMPAIGN, Ill. — A new study provides "incontrovertible evidence" that the volcanic super-eruption of Toba on the island of Sumatra about 73,000 years ago deforested much of central India, some 3,000 miles from the epicenter, researchers report. The volcano ejected an estimated 800 cubic kilometers of ash into the atmosphere, leaving a crater (now the world's largest volcanic lake) that is 100 kilometers long and 35 kilometers wide. Ash from the event has been found in India, the Indian Ocean, the Bay of Bengal and the South China Sea. The bright ash reflected sunlight off the landscape, and volcanic sulfur...