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Geotimes August 2003 Sara Pratt |
Tertiary acid rain survivors Now geochemists Teruyuki Maruoka, of Washington University in St. Louis, Mo., and Christian Koeberl, of the University of Vienna in Austria, have revisited the longstanding question of how some freshwater species could have survived rain with a pH potentially as low as battery acid.  |
Geotimes January 2004 Megan Sever |
Unraveling the Chicxulub Case On the Yucatan Peninsula in Mexico, geologists are drilling one of Earth's three largest impact structures, hoping to reveal clues about a devastating event linked to the extinction of the dinosaurs 65 million years ago.  |
Chemistry World December 2, 2013 Ian Randall |
Mass extinction the result of acid rain and ozone loss Widespread rain as acidic as lemon juice and the destruction of as much as 65% of the ozone layer may have played a major role in the largest mass extinction in the fossil record.  |
Chemistry World July 23, 2008 Lewis Brindley |
'Acid soot' worsens smog Researchers in the US say soot particles in the atmosphere combine with other pollutants to pick up an acid coating that may worsen their influence on local smog and global warming.  |
Chemistry World April 6, 2009 Simon Hadlington |
Did salt lake halogens help cause mass extinction? Life on Earth was all but obliterated around 250 million years ago - but no-one knows why.  |
Geotimes March 2004 Megan Sever |
Extinction debate continues Did the Chicxulub impact off the Yucatan coast in Mexico kill the dinosaurs 65 million years ago?  |
Geotimes August 2004 Sara Pratt |
Burrowing K/T Survivors When it comes to the mass extinction that marked the Cretaceous/Tertiary (K/T) boundary 65 million years ago, what it all came down to, researchers say, is that only those who hid had a chance to survive.  |
Geotimes November 2007 Carolyn Gramling |
Acid Rain Alters Coastal Waters Excess carbon dioxide, sulfur and nitrogen from fossil fuel burning, agricultural runoff and other human sources are changing ocean chemistry -- and that impact is especially pronounced along the coasts, new research suggests.  |
Geotimes October 2006 |
Geocatastrophes Catastrophe and Opportunity in an Ancient Hot-House Climate... When the Mediterranean Dried Up: Forensics of a Geocatastrophe... The Great Death: Redefining a Mass Extinction...  |
Geotimes October 2005 Megan Sever |
Volcanic Prepping for Dinosaur Extinction Many scientists accept that an impact on Mexico's Yucatan Peninsula is to blame for the dinosaurs' demise. But as more research is conducted on a lava flow in India, some geologists grow more convinced that the environment was already significantly perturbed when that projectile struck, and that the impact was simply a final straw.  |
Chemistry World May 9, 2013 Simon Hadlington |
Mineral dust plays key role in cloud formation, chemistry Mineral dust that swirls up into the atmosphere from Earth's surface plays a far more important role in both cloud formation and cloud chemistry than was previously realized.  |
Geotimes July 2004 Megan Sever |
Possible P/T Impact Crater A group of scientists now says they have uncovered a crater that may be responsible for the mass extinction at the end of the Permian, and their results are inciting a new flurry of controversy.  |
Geotimes June 2004 Jay Chapman |
Evidence for Impact Winter at K/T Boundary Scientist and co-workers hope their research will revitalize interest in the impact-winter hypothesis and help resolve some of the questions swirling around the Cretaceous-Tertiary (K/T) mass extinction theory.  |
Geotimes April 2005 David B. Williams |
Mass Extinction, Massive Problem The great debate continues over the Great Dying -- the largest of all mass extinctions, which occurred 250 million years ago. The latest round of research casts doubt on an extraterrestrial impact as the cause of the extinction event.  |
Geotimes March 2007 Nicole Branan |
Volcanic Signatures Reveal Climate Clues Besides providing a new tool to look at the climate impact of past volcanic eruptions, a new study also brings atmospheric scientists a step closer to unraveling the chemistry that sulfur aerosols undergo while they are in the stratosphere, which could help improve climate models.  |
Chemistry World March 4, 2010 Hayley Birch |
Accumulation of acid in atmosphere explained The research could also have implications for global climate modelling, enabling scientists to reduce uncertainties related to the effects of aerosols in their predictions.  |
Geotimes October 2006 Kathryn Hansen |
Debate Continues Over Dinosaur Demise Analysis of new core samples support previous research from that the Chicxulub meteor struck about 300,000 years prior to the K/T extinction event and, therefore, did not cause extinction of the dinosaurs.  |
Geotimes July 2003 Joyce A. Ober |
Mineral Resource of the Month: Sulfur Information on sulfur, global production of which minimizes the environmental effects of oil and natural gas production.  |
National Gardening Charlie Nardozzi |
Minerals for Soil How to use rock-based fertilizers and amendments to increase the vitality of your soil  |
Chemistry World November 10, 2010 Mike Brown |
Sulfur story unearths oxygen environment Earth's atmosphere could have supported complex life 400 million years earlier than thought, according to sulfur isotope signatures found in some of the oldest rocks on Earth.  |
Chemistry World July 6, 2009 Ned Stafford |
Sulfate-coated soot boosts global warming Sulfate and nitrate particles in the atmosphere are thought to help combat global warming because they reflect sunlight, but a new study suggests that when combined with soot the particles could instead enhance global warming.  |
Geotimes January 2005 Sara Pratt |
Acid Rain Curbs Global Warming In an odd twist that highlights the complex nature of interactions between Earth's systems, researchers have found that acid rain is significantly suppressing the global emission of methane from wetlands.  |
National Defense February 2016 Stew Magnuson |
Planetary Defense: A New Hot Market With little fanfare, NASA in January opened up its planetary defense coordination office with a mandate to identify potential chunks of rock hurdling toward Earth and to stop them if possible.  |
IEEE Spectrum April 2012 Gregory L. Matloff |
Deflecting Asteroids A solar sail could use light to nudge an earthbound rock into an orbit we could live with  |
Popular Mechanics December 2006 David Noland |
The Threat is Out There More than 100,000 asteroids hurtle past our planet. But only one -- that we know of -- may hit us in the next 30 years.  |
Chemistry World November 12, 2009 Simon Hadlington |
Carbonic acid captured Scientists from Germany and Israel have caught a fleeting glimpse of carbonic acid, the simple yet elusive molecule that plays a key role in nature.  |
Chemistry World August 25, 2011 Simon Hadlington |
Meteorites Are a Chip Off the Old Asteroid Block New findings confirm that the most common type of meteorite found on Earth derive from so-called stony or S-type asteroids.  |
IEEE Spectrum January 2008 Barry E. DiGregorio |
No Asteroid Impact on Mars After All The expected asteroid impact would have let scientists study crater formation and underlying Martian geology.  |
Chemistry World March 18, 2013 Simon Hadlington |
Dried lake bed on Mars 'could have supported life' New chemical analysis by the Mars rover Curiosity suggests that Mars was once more hospitable to life.  |
Geotimes November 2006 Carolyn Gramling |
Airing Out an Early Atmosphere Scientists have generally thought that oxygen was scarce in Earth's atmosphere until about 2.4 billion years ago. Now a study based on new evidence suggests that oxygen may actually have been around longer than previously thought.  |
Chemistry World July 21, 2010 James Urquhart |
Volatile elements locked in moon rock Samples of a mineral present on the Moon and on Earth have been found to contain almost the same concentrations of hydrogen, chlorine and sulfur, adding weight to questions over how the Moon formed and evolved.  |
Chemistry World August 10, 2009 Simon Hadlington |
New catalyst for methane to methanol Chemists in Germany have invented a new solid catalyst for converting methane to methanol.  |
Chemistry World May 13, 2014 Tim Wogan |
Chemistry calculations reveal Earth's inner core Theoretical calculations have confirmed that the Earth's core contains a significant proportion of oxygen.  |