One of the greatest scientific mystery has involved the comet that caused extinction of dinosaurs and mass destruction to food chain that has existed. Although the modern world has advanced significantly in technology and science, there is still much more mystery to be discovered about the early earth and the events that took place for the extinction of many species. Many scientists have created multiple theories on how the dinosaurs and other species went extinct. Walter Alvarez, a Berkeley scientist, investigates the giant impact and writes “T. rex and the Crater of Doom,” which explains a giant extraterrestrial impact that brought destruction to many of the plant and animal species, including dinosaurs, sixty five million years ago. Alvarez …show more content…
Alvarez explains that although the comet was devastating to the dinosaurs, the destruction may have an important factor in the process of evolution and the expansion of diversity. Because the dinosaurs, the physically dominant, became extinct, the less physically dominant such as humans and other species had an opportunity to survive. In this case, the comet destroyed all the dinosaurs but allowed the weaker animals to survive. From this point of view, the comet and extinction caused diversity and helped the process of evolution. Alvarez, searching for the truth behind dinosaur extinction, examined rocks at Gubbio, Italy. He knew that plenty forams, type of single celled organisms, existed on clay in the tertiary period. But when the clay was examined in Mesozoic era, it was discovered that much of the forams was not there. This lead to the conclusion that only a giant impact could have caused so many forams to disappear and more evidence was found for the extinction of dinosaurs. Although a tragedy occurred for the dinosaurs through the giant impact, the humans and the less dominant gained an opportunity and evolution thrived which brought more diversity and unity of