Were Dinosaurs Dumb?
- Death, taxes, and extinction. Archibald, J. David // National Forum;Summer98, Vol. 78 Issue 3, p32
Explores the various theories concerning the mass extinction of dinosaurs. Most famous mass extinction; Three theories of extinction; Results of marine regression; Important pieces of physical evidence supporting an asteroid impact.
- The day the dinosaurs died. Cowen, Ron // Astronomy;Apr96, Vol. 24 Issue 4, p34
Focuses on the theory that the planet Earth collided with an asteroid or comet which killed the dinosaurs. Discovery of a buried crater in the Yucatan Peninsula; Solar system impact; Ramifications of a large impact; Chronology of the catastrophe. INSET: Tracking down Chicxulub..
- Step-wise extinctions preceded demise of dinosaurs. Dayton, Leigh // New Scientist;7/7/90, Vol. 127 Issue 1724, p27
Details the research finding of a group of Canadian scientists that the dinosaurs were not wiped out by a single catastrophic event, such as an asteroid impact or volcanic eruption. Identification of a series of step-wise extinctions; Doubts raised about the impact theory of the Canadian...
- Crispy Critters? // Odyssey;Apr2000, Vol. 9 Issue 4, p3
Focuses on a study by oceanographers, which suggests that dinosaurs might have perished in a gas-fueled firestorm of high intensity.
- Did sea-level fall kill the dinosaurs? Hecht, Jeff // New Scientist;04/05/97, Vol. 154 Issue 2076, p19
Focuses on the hypothesis that falling sea levels and volcanic eruptions contributed to the extinction of the dinosaurs at the end of the Cretaceous period. Effect of the environmental changes on the animals; Theory on the asteroid crash in Mexico; Study on the fossil record of extinction.
- Did sea-level fall kill the dinosaurs? Hecht, Jeff // New Scientist;05/05/97, Vol. 154 Issue 2076, p19
Reports on evidence indicating that changes in the earth's environment may have played the pivotal role in killing of the dinosaurs 65 million years ago. Findings of British researchers led by Norman MacLeod of the Natural History Museum in London; Drop in sea level as a major factor in...
- A double whammy? Jaroff, Leon; Bjerklie, David // Time International (South Pacific Edition);1/9/95, Issue 2, p36
Reports on the scientists' opposing views over the theories on what caused the extinction of dinosaurs. Aftermath of the impact caused by a huge comet or asteroid; Formation of an earth-enveloping shroud by clouds of sulfuric acid; Intense volcanic activities on the opposite side of the earth,...
- Dinosaurs' demise. // Wilson Quarterly;Winter91, Vol. 15 Issue 1, p127
Comments on the articles titled `An Extraterrestrial Impact,' by Walter Alvarez and Frank Asaro and `A Volcanic Eruption,' by Vincent E. Courtillot published in the October 1990 issue of `Scientifc American.' Arguments on the causes of dinosaur extinction; Evidence provided by the...
- No statistical support for sudden (or gradual) extinction of dinosaurs: Comment and reply. Sheehan, P. M.; Fastovsky, D.E. // Geology;Oct96, Vol. 24 Issue 10, p957
Presents a debate concerning the presence or absence geologic and statistical evidences supporting theories on the extinction of dinosaurs. Alleged failure of fossil records to represent random samples of the extinction's duration; Merits of diversity measurements in dinosaur fossil findings in...