Dinosaur Essay -- essays papers

DinosaurDinosaurs Extinct or Natural Causes As geological time goes, all(a) the dinosaurs living on earth suddenly disappeargond. How did these henpecked and gigantic creatures really die? Was it a slow extinction with natural causes, or did it happen suddenly? These questions give rise to many an(prenominal) different beliefs on how the dinosaurs disappeargond over cardinal million years ago. Something happened sixty-five million years ago, at the end of the Cretaceous period that was so devastating that it altered the course of life on earth. Extinction is easily defined the birth rate fails to keep up with the death rate. However, the exposition does not answer the question ab unwrap the nature or causes of extinction. Since so many different causes of death of the dinosaur arose, paleontologists generally divide extinction into both main types. The first is called background extinction, or the isolated extinction of a species due to a variety of cause. Included i n these background extinctions is out competition (the fight of the food), depletion of resources in a habitat, changes in climate, development or destruction of a mountain range, river channel migration, eruption of a volcano, the drying of a lake, or the destruction of a forest, grassland, or wetland habitat. The second type of extinction is called mass extinction. There are four main components Large numbers species go extinct many types of species go extinct the effects are global and the effects occur in a geologically bypass period of time (Encarta). The dinosaur could not have lived forever. No creature, plant, and bacteria are forever, not even Homo Sapiens. Extinction is the ultimate fate of all species. One theory on how the dinosaurs became extinc... ... environmental crisis may have spelled happening for the dinosaurs. It had to be so sweeping that it affected countless other forms, including the dinosaurs. It is how these triple-crown creatures were elimina ted from the planet is a fascinating mystery. however, scientist cannot determine how dinosaurs really became extinct. Perhaps something ferine the sky and struck the planet causing a huge debris cloud, utterly shutting out the sun and forcing the dinosaurs into extinction. But why did the diminutive mammals survive, or the crocodiles and birds? Current evidence suggests that the sun or a nursery effect terminated the dinosaurs sixty-five million years ago (Colbert).BibliographyColbert, Edwin Harris, 1905- Dinosaurs Their baring and Their World. New York, E. P. Dutton & Co.,INC., 1961, 1st ed.Encarta Encyclopedia Article, Dinosaur, 2001