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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 2004
Megan Sever |
Extinction debate continues Did the Chicxulub impact off the Yucatan coast in Mexico kill the dinosaurs 65 million years ago? |
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
May 2005
Megan Sever |
Meteor Crater's Slow Impact New findings suggest that rather than one large meteorite striking the ground at a high velocity, a lower velocity, pancake-shaped swarm of meteorite pieces -- formed from the explosion a larger meteorite -- likely carved out Meteor Crater. |
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. |
Scientific American
May 16, 2005
Barry E. DiGregorio |
Doubts on Dinosaurs Yucatan impact crater may have occurred before the dinosaurs went extinct. |
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
December 2005 |
Highlights 2005 -- Paleontology The "Great Dying" debate... Tracking human migration... More "hobbits" in Indonesia... T. rex bones break ground... An evolving debate... |
Chemistry World
March 11, 2014
Tim Wogan |
Dinosaur mass extinction may have been triggered by acid rain Most scientists accept the principal cause of the Cretaceous -- Tertiary mass extinction was a 10km asteroid hitting the Yucatan peninsula, but the precise mechanism by which this caused the extinction remains controversial. |
Geotimes
January 2006
Megan Sever |
Sizing up a Crater New modeling of the impact of an Eocene extraterrestrial projectile in what is now the Chesapeake Bay shows that it was smaller than previously thought, and could help better predict the effects of future potential impacts. |
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. |
Geotimes
January 2004
C. Wylie Poag |
Coring the Chesapeake Bay Impact Crater An extraterrestrial impact 36 million years ago left a lasting impression in the Chesapeake Bay and continues to affect the region's environment today. |
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. |
Popular Mechanics
September 24, 2009
Joe Pappalardo |
Water Found on Moon These images show a very young lunar crater on the side of the moon that faces away from Earth, as viewed by NASA's Moon Mineralogy Mapper on the Indian Space Research Organization's Chandrayaan-1 spacecraft. |
Scientific American
May 2009
Choi & Wilcox |
Updates: Whatever Happened to the Universal Flu Vaccine? Fighting influenza... Mass extinctions... Stem cell ban... The right to sue drug companies... |
Geotimes
January 2004
Lisa M. Pinsker |
Impacts in Space and on Earth: An Interview with Carolyn Shoemaker Carolyn Shoemaker has discovered more comets than anyone else alive today. Under the tutelage of her late husband, Carolyn learned how to identify these objects both in the sky and on the ground. |
Popular Mechanics
January 5, 2010
Jeremy Jacquot |
The Top 4 Sites to Land on Mars and Their Biggest Mysteries Scientists at the Pasadena based NASA research center will decide within the next two years where to send the Mars Science Laboratory rover after it launches in the fall of 2011. |
Geotimes
October 2003
Naomi Lubick |
Vertebrates and tectonics Paleontologists suggested some new twists on tectonics and ecosystems at the annual meeting of the Society of Vertebrate Paleontology. Their ideas might offer answers to some key conundrums regarding extinction, speciation and the global distribution of vertebrate species. |
| AskMen.com |
Water On The Moon NASA says a spacecraft that was intentionally crashed into the moon has turned up the best evidence yet of water. |
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. |
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. |
Geotimes
December 2003
Naomi Lubick |
Vertebrates and tectonics Paleontologists suggested some new twists on tectonics and ecosystems at the annual meeting of the Society of Vertebrate Paleontology (SVP), held mid-October. Their ideas might offer answers to some key conundrums regarding extinction, speciation and the global distribution of vertebrate species. |
Scientific American
May 8, 2006
Graham P. Collins |
Chaos in the Crater Welcome to the Vredefort Crater, a real Bermuda Triangle about 100 kilometers southwest of Johannesburg. It is the oldest and largest impact remnant on the planet, created by an asteroid about two billion years ago. |
Geotimes
September 2006
Kathryn Hansen |
Opportunity Reaches Martian Crater Cameras aboard NASA's Mars rover Opportunity captured the vast expanse of Victoria crater. |
Geotimes
July 2005
McFadden & Schultz |
Collision Course: Deep Impact The Deep Impact project will shed light on some fundamental scientific questions about comets, including what they are made of and how they formed. |
Popular Mechanics
November 13, 2009
Jeremy Jacquot |
NASA Confirms There is Water on the Moon--But Where Did It Come From? By obtaining core samples like the ice cores collected by scientists in the Antarctic, it will be possible for scientists to study the climatic record of the moon and draw comparisons with the Earth's. |
Science News
January 1, 2005 |
From the December 29, 1934, Issue Oregon's Famous Crater Lake Not 1,000 Years Old... Internal Structure of Chromosomes Explored... Revolutionary Method of Power Transmission Urged... |
