Complete 6 pages APA formatted article: End of the World of Dinosaurs. The unexplained demise of this group of animals that was associated with immense diversity and vigor by the end of the Cretaceous period remained a challenge even to the law of the fittest as well as the theory of evolution. Similarly, many of the dinosaur paleontologists have kept asking questions about the dinosaurs going extinct. However, although scientists have not agreed entirely on the exact cause of the mass of dinosaurs, there are a number of theories that have been put forward to explain the possible causes of the end-Cretaceous extinction that may have also resulted in the loss of more than 50% of the Earth’s species. This paper critically analyzes the end of the world of dinosaurs with particular focus on the major theories explaining their eventual demise on the face of the Earth.
Scientists concur that all dinosaurs had died out at the end of the Cretaceous period. In an attempt to explain this mystery, a number of models and ideas have been proposed with the intention of accounting for the fall from the grace of dinosaurs. Two of the most common proposals are gradualist theory and the impact theory (Debus and Mark 176). The gradualist theory points to a reduction in the diversity and number of varied groups of marine and land animals. It asserts that the disappearance of these groups was based on climatic change. the climate towards the end of the Cretaceous period was characterized by cooling plus a fall in the sea level thus resulting in a reduction in the habitats of dinosaurian plus the shallow-water marine animals.
On the other hand, the impact hypothesis happens to get much press coverage based on its spectacular nature. There is sufficient evidence supporting the scene of an asteroid impact at the fall of the Cretaceous. According to many researchers, the asteroid may have been about 10 kilometers in diameter struck the earth at a place presently known as the Yucatan peninsula, Mexico.