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  • The Nastiest Feud in Science

    08/12/2018 7:56:38 PM PDT · by DUMBGRUNT · 56 replies
    The Atlantic ^ | Sept 2018 | BIANCA BOSKER
    ...But Keller doesn’t buy any of it. “It’s like a fairy tale: ‘Big rock from sky hits the dinosaurs, and boom they go.’ And it has all the aspects of a really nice story,” she said. “It’s just not true.” ...Keller’s resistance has put her at the core of one of the most rancorous and longest-running controversies in science. “It’s like the Thirty Years’ War,” says Kirk Johnson, the director of the Smithsonian’s National Museum of Natural History. Impacters’ case-closed confidence belies decades of vicious infighting, with the two sides trading accusations of slander, sabotage, threats, discrimination, spurious data, and...
  • Powerful Earthquakes Can Trigger Other Ones on Opposite Side of Earth, New Research Shows

    08/09/2018 10:55:39 AM PDT · by ETL · 29 replies
    Sci-News ^ | Aug 9, 2018 | News Staff / Source
    It had been thought that aftershocks — smaller magnitude quakes that occur in the same region as the initial quake as the surrounding crust adjusts after the fault perturbation — were the only seismic activity an earthquake could lead to. But the team’s analysis of seismic data from 1973 through 2016 provided the first discernible evidence that in the three days following one large quake, other earthquakes were more likely to occur. Each test case in the study represented a single three-day window ‘injected’ with a large-magnitude (6.5 or greater) earthquake suspected of inducing other quakes, and accompanying each case...
  • Did Dinosaur-Killing Asteroid Trigger Largest Lava Flows on Earth?

    05/11/2015 1:22:51 PM PDT · by SunkenCiv · 32 replies
    Astrobiology ^ | May 1, 2015 | University of California, Berkeley
    The asteroid that slammed into the ocean off Mexico 66 million years ago and killed off the dinosaurs probably rang the Earth like a bell, triggering volcanic eruptions around the globe that may have contributed to the devastation, according to a team of University of California, Berkeley, geophysicists. Specifically, the researchers argue that the impact likely triggered most of the immense eruptions of lava in India known as the Deccan Traps, explaining the "uncomfortably close" coincidence between the Deccan Traps eruptions and the impact, which has always cast doubt on the theory that the asteroid was the sole cause of...
  • Death in the deep: Volcanoes blamed for mass extinction

    07/16/2008 11:35:55 AM PDT · by decimon · 27 replies · 158+ views
    AFP ^ | Jul 16, 2008 | Unknown
    PARIS (AFP) - Ninety-three million years ago, Earth was a reshuffled jigsaw of continents, a hothouse where the average temperature was nearly twice that of today. Palm trees grew in what would be Alaska, large reptiles roamed in northern Canada and the ice-free Arctic Ocean warmed to the equivalent of a tepid swimming pool. So our planet was balmy -- but hardly a biological paradise, for it was whacked by a mass die-out. The depths of the ocean suddenly became starved of oxygen, wiping out swathes of marine life.
  • Gas-belching volcanoes may have killed dinosaurs

    03/20/2008 1:49:58 PM PDT · by NormsRevenge · 68 replies · 875+ views
    Reuters on Yahoo ^ | 3/20/08 | Ben Hirschler
    LONDON (Reuters) - Gas-belching volcanoes may be to blame for a series of mass extinctions over the last 545 million years, including that of the dinosaurs, new evidence suggested on Thursday. A series of eruptions that formed the Deccan Traps in what is now India pumped huge amounts of sulfur into the atmosphere 65 million years ago, with likely devastating repercussions for the Earth's climate, scientists said. Gigantic eruptions, forming so-called "flood basalts," are one of two leading explanations for a series of mass extinctions that have killed off species periodically throughout history. The other theory involves asteroid impacts --...
  • Report questions role of Mexico crater in mass extinction

    03/01/2004 3:54:21 PM PST · by yonif · 14 replies · 453+ views
    WQAD ^ | March 1, 2004 | AP
    Washington-AP -- New research casts doubt on the theory that a single asteroid wiped out the dinosaurs. Scientists have often pointed to a crater in Mexico as the asteroid's impact point. But Princeton University researchers say the impact that caused the crater occurred 300-thousand years before the dinosaurs were wiped out 65 (m) million years ago. A report appears in this week's online edition of Proceedings of the National Academy of Sciences. At least one scientist doubts the group's findings. Richard Norris of the Scripps Institution of Oceanography says the Princeton researchers were working with incorrect site data.
  • Earth's Volcanism Linked To Meteorite Impacts

    12/13/2002 8:36:39 AM PST · by blam · 34 replies · 1,459+ views
    New Scientist ^ | 12-13-2002 | Kate Ravilious
    Earth's volcanism linked to meteorite impacts 14:31 13 December 02 Exclusive from New Scientist Print EditionSpace rocks are blamed for violent eruptions (Image: GETTY) Large meteorite impacts may not just throw up huge dust clouds but also punch right through the Earth's crust, triggering gigantic volcanic eruptions. The idea is controversial, but evidence is mounting that the Earth's geology has largely been driven by such events. This would also explain why our planet has so few impact crater remnants. Counting the number of asteroids we see in the sky suggests that over the past 250 million years, Earth should have...
  • Maybe an Asteroid Didn't Kill the Dinosaurs

    05/09/2009 2:45:01 PM PDT · by antiunion person · 30 replies · 1,828+ views
    Time CNN ^ | Monday, Apr. 27, 2009 | Jeffrey Kluger
    When a scientific principle is common knowledge even in grammar school, you know it has long since crossed the line from theory to established fact. That's the case with dinosaur extinction. Some 65 million years ago — as we've all come to know — an asteroid struck the earth, sending up a cloud that blocked the sun and cooled the planet. That, in turn, wiped out the dinosaurs and made way for the rise of mammals. The suddenness with which so many species vanished after that time always suggested a single cataclysmic event, and the 1978 discovery of a 112-mile,...
  • Far More Than A Meteor Killed Dinos, Evidence Suggests

    10/25/2006 3:33:16 PM PDT · by blam · 95 replies · 2,818+ views
    Science Daily ^ | 10-24-2006 | GSA
    Source: Geological Society of America Date: October 24, 2006 Far More Than A Meteor Killed Dinos, Evidence Suggests There's growing evidence that the dinosaurs and most their contemporaries were not wiped out by the famed Chicxulub meteor impact, according to a paleontologist who says multiple meteor impacts, massive volcanism in India, and climate changes culminated in the end of the Cretaceous Period. Cottonmouth Creek waterfall over the event deposit with reworked Chicxulub impact spherules. The original Chicxulub ejecta layer was discovered in a yellow clay layer 45 cm below the base of the event deposit. The yellow clay represents a...
  • 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...
  • New blow for dinosaur-killing asteroid theory

    04/27/2009 12:33:23 PM PDT · by decimon · 56 replies · 1,595+ views
    National Science Foundation ^ | Apr. 27, 2009 | Unknown
    Impact didn't lead to mass extinction 65 million years ago, geologists findThe enduringly popular theory that the Chicxulub crater holds the clue to the demise of the dinosaurs, along with some 65 percent of all species 65 million years ago, is challenged in a paper to be published in the Journal of the Geological Society on April 27, 2009. The crater, discovered in 1978 in northern Yucutan and measuring about 180 kilometers (112 miles) in diameter, records a massive extra-terrestrial impact. When spherules from the impact were found just below the Cretaceous-Tertiary (K-T) boundary, it was quickly identified as the...
  • Double whammy causes mass extinctions

    10/24/2006 11:00:01 AM PDT · by SunkenCiv · 11 replies · 383+ views
    Discovery News ^ | Tuesday, October 24, 2006 | Larry O'Hanlon
    "[The theory] is essentially a more eloquent way of saying what I and many other palaeontologists have been saying for many years," says Professor Gerta Keller of Princeton University. "Namely that the impact-kill hypothesis is all wrong. Impacts alone could not have been the killing mechanism for the K-T [Cretaceous-Tertiary event] or any of the other major mass extinctions." ... "I'm very happy they have done the analysis based on the literature and come up with the same conclusions that palaeontologists have been preaching all along," Keller says.
  • Bang goes that theory: Dinosaur extinction 'occurred 300,000 years AFTER asteroid impact'

    04/27/2009 4:35:51 PM PDT · by Free ThinkerNY · 16 replies · 1,024+ views
    dailymail.co.uk ^ | April 27, 2009 | Daily Mail Reporter
    The popular theory that dinosaurs were wiped out by an asteroid 65million years ago has been challenged. It was believed the Chicxulub crater in Mexico was the 'smoking gun' of the mass extinction event. Molten droplets from the ancient asteroid impact were found just below the Cretaceous-Tertiary boundary - a geological layer of sediment linked with the extinction. But soil samples from the 112-mile wide crater show the impact predates the disappearance of the dinosaurs by about 300,000 years. The latest research has been published in the Journal of the Geological Society. Study author Professor Gerta Keller from Princeton University...
  • I'VE GOT A BONE TO PICK WITH YOU, SAY FEUDING DINOSAUR EXPERTS

    09/29/2003 7:58:13 PM PDT · by Mike Darancette · 31 replies · 169+ views
    The Observer ^ | 7 Sept. 2003 | Robin McKie
    The world's biggest bang wiped out the dinosaurs in a cataclysm that swathed our planet in choking dust - or at least that is what many palaeontologists claim. Others say dinosaurs died out gradually as Earth's climate and geology changed. It sounds a typical academic dispute - but last week it erupted into open warfare. Allegations have been made of deceit and unethical behaviour. One scientist is even alleged to have held back inconvenient evidence. 'This affair has become an object lesson on how partisan and unethical the whole dinosaur controversy has become,' said Dr Norman MacLeod, keeper of palaeontology...
  • Mass-extinction controversy flares again (Chicxulub crater kills dinosaurs, or not?)

    04/11/2003 2:34:46 PM PDT · by SteveH · 29 replies · 1,280+ views
    Nature ^ | 10 April 2003 | Rex Dalton
    EGS-AGU-EUG Joint Assembly, Nice, April 2003 Mass-extinction controversy flares again Core from asteroid crater fuels debate on what wiped out the dinosaurs. 10 April 2003 REX DALTON [photo] The dinosaurs were wiped out 65 million years ago. © alamy.com A claim that the asteroid that struck Mexico 65 million years ago did not cause the mass extinction that wiped out dinosaurs triggered heated debate at a meeting this week. The announcement is based on preliminary analysis of the first core drilled into the 185-kilometre Chicxulub asteroid crater near the Yucatan Peninsula. Gerta Keller of Princeton University in New Jersey says...
  • K/T MASS EXTINCTION: WHAT REALLY KILLED OFF THE DINOSAURS?

    11/14/2003 1:01:22 PM PST · by Mike Darancette · 32 replies · 602+ views
    The Guardian ^ | 13 November 2003 | Ian Sample
    Just as scientists thought they had nailed down the answer, the debate has been reopened. A team of scientists claims the widely accepted theory that the extinction was triggered by a huge asteroid thumping into Mexico 65m years ago, cannot be true. Evidence that a giant asteroid impact was the cause of the dinosaurs' demise first emerged in the 1980s. Scientists analysing ancient soils in Italy found that layers of clay from the end of the Cretaceous period, the time the dinosaurs vanished, were unusually rich in a heavy metal called iridium. Later evidence of the layer was found in...
  • NEW EVIDENCE THAT VOLCANOS KILLED THE DINOSAURS -

    09/15/2003 8:48:14 PM PDT · by UnklGene · 60 replies · 4,705+ views
    Red Nova ^ | September 15, 2003
    September 15, 2003 Could an enormous volcanic eruption have killed the dinosaurs? Cardiff University -- The extinction of the dinosaurs -– thought to be caused by an asteroid impact some 65 million years ago –- was more likely to have been caused by a 'mantle plume' -– a huge volcanic eruption from deep within the earth's mantle, the region between the crust and the core of the earth. This theory, already supported by a significant body of geologists and palaeontologists, is strengthened by new evidence to be presented at an international conference at Cardiff University on 11-12 September. Research by...
  • Volcano Theory of Dino Die-Off Gets New Support

    11/07/2007 4:47:01 AM PST · by Renfield · 9 replies · 456+ views
    National Geographic ^ | 11/05/07 | Richard A. Lovett
    A series of gargantuan volcanic eruptions may have ended at nearly the same time that the dinosaurs went extinct, a new study shows. The find bolsters a controversial theory that massive volcanism contributed to the global catastrophe known as the K-T extinction, which wiped out the dinosaurs and many of Earth's other organisms 65 million years ago. Gerta Keller, a Princeton University paleontologist, presented the new research last week at a meeting of the Geological Society of America in Denver, Colorado. She found that underwater portions of the ancient lava flows, known as the Deccan Traps, contained marine fossils only...
  • Volcanic Eruptions, Not Meteor, May Have Killed The Dinosaurs

    10/31/2007 3:08:40 PM PDT · by blam · 25 replies · 232+ views
    Science Daily ^ | 10-30-2007 | Geological Society of America.
    Volcanic Eruptions, Not Meteor, May Have Killed The DinosaursRajahmundry Quarry. Keller's crucial link between the eruption and the mass extinction comes in the form of microscopic marine fossils that are known to have evolved immediately after the mysterious mass extinction event. The same telltale fossilized planktonic foraminifera were found at Rajahmundry near the Bay of Bengal, about 1000 kilometers from the center of the Deccan Traps near Mumbai. (Credit: Photo courtesy Gerta Keller) ScienceDaily (Oct. 30, 2007) — A series of monumental volcanic eruptions in India may have killed the dinosaurs 65 million years ago, not a meteor impact in...
  • Dinosaur impact theory challenged

    03/01/2004 7:13:19 PM PST · by Indy Pendance · 26 replies · 761+ views
    BBC ^ | 3-1-04 | Paul Rincon
    Scientists may have destroyed the well-established theory that a single, massive asteroid strike killed off the dinosaurs 65 million years ago. New data suggests the Chicxulub crater in Mexico, supposedly created by the collision, predates the extinction of the dinosaurs by about 300,000 years. The controversy over what killed the dinosaurs may run and run The authors say this impact did not wipe out the creatures, rather two or more collisions could have been responsible. The report is published in Proceedings of the National Academy of Sciences. An international group of scientists led by Professor Gerta Keller, of Princeton University,...