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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.   |
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
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
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
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
May 2005
Sara Pratt |
Soot From Indian Cooking A new study says that residential cooking -- with stoves that burn wood, crop waste and dried animal manure -- is actually the largest source of soot emissions in India. Understanding this pollution source could have an important role in bettering both air quality and climate models. |
Geotimes
January 2005
Joshua Zaffos |
Honeybee Survival Stings Impact Theory The buzz over the causes of the mass extinction 65 million years ago is getting louder. Now, a paleontology graduate student has found evidence in the survival of tiny honeybees that could be another sting to that theory. |
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. |
