Dinosaur Dinosaurs: Extinct or Natural Causes As geologic time goes, all the dinosaurs living on earth suddenly disappeared. How did these dominated and gigantic creatures really die? Was it a slow extinction through natural causes, or did it happen suddenly? These questions give rise to many different beliefs on how the dinosaurs disappeared over sixty-five 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 of Dinosaurs Many different theories exist as to why the dinosaurs went extinct. We know for sure most dinosaurs died out around 65 million years ago. The majority of scientists agree on a number of theories as to what brought the end of the dinosaurs. The most popular theory is that an asteroid ended the reign of the dinosaurs. Another theory, massive climate change in the pre-historic atmosphere, caused all the dinosaurs to die.
Theories of the Extinctions of the Dionsaurs: Dinosaurs became extincted 65 million years ago, at the end of the Cretaceous period, something so devastating that it altered the course of life on earth. It seems like it happened so sudden, as geologic time goes, that almost all the dinosaurs living on earth disappeared. So how did these dominant creatures just die off? Was it a slow extinction, or did it happen all of the sudden? These questions bring rise to many different beliefs on how the dinosaur disappeared over 65 million years ago.
Instead of gradually dying off, dinosaurs perished within one generation. Although the two hypotheses of the great extinction come from opposite occurrences, in the end the event proved fatal. While paleontologists may never agree on the true cause of dinosaurs' extinction, many people are now speculating mankind's termination. Will mother nature be responsible for our destruction also? Only time will tell.
This is due to the violent event that caused it the extinction, as well as the chapter of earth’s history that it closed: the Dinosaurs. The Cretaceous Event ( often shortened to K-T event) Of the animals that were killed off were the flying reptiles (pterosaurs) and the last few mosasaurs and plesiosaurs, both early marine reptiles. Many mollusks and species of microscopic plankton were killed. Terrestrial plants suffered mass extinction as well. Almost 60% of terrestrial plants were lost.
Because the CO2 levels are rising, the ice caps are melting and many more animals can become extinct. When pangea started splitting, there was a lot of volcanic activity, which cause the death of many dinosaurs. A meteor also hit earth and the mass extinction of many land and marine animals happened. There have been five mass extinctions in Earth’s history. The worst one wiped out ninety-six percent of marine life and seventy percent of land organisms.
If the current trend continues, at least 50% of all currently existing species will be either extinct or endangered by the year 2050 (Today’s Situation). For this reason endangered species deserve more protection than the current regulations provide. Throughout history there have been many different reasons for the extinction of species. The earliest known reason was 64-66 million years ago when scientists believe a meteorite struck earth causing the extinction of the dinosaur and of 85% of the species existing at the time (Sherry, 2). Another major problem is the introduction of species into a new environment.
During the course of history, two theories have evolved that explain what happened to the dinosaurs. These two theories have been debated back and forth between evolutionists and religious followers. Evolutionists believe that dinosaurs became the most powerful beings on Earth around 235 million years ago. They believe that no humans existed at the time. Evolutionist views also say that all the dinosaurs were killed by a cataclysmic event.
The widespread Extinction of plants can be seen in both studies of fossil pollen, and fossil leaves. Approximately 57% of plant species became extinct in North America, whereas in the southern hemisphere the extinction only caused short-term changes in the abundance of different plant groups. Many different types of birds survived the extinction and are thus regarded as “the only surviving dinosaurs” they survived the event due to their various abilities in seeking shelter which assisted during the environmental aftereffects. Many scientists agree that all non-avian dinosaurs became extinct at the Cretaceous/Tertiary event, likely due to their inability to burrow, swim or dive, meaning that they were unable to protect themselves from the worst parts of any environmental aftermath that occurred at the K–T period. Additionally, unlike their crocodile relatives, the warm blooded dinosaurs needed a lot more food to sustain their metabolism, so even if there were survivors, they would have died of
Like a big meteor crashed into the ground and killed a bunch of them: then the plants died, causing the herbivore’s to die; then when the herbivores died with the carnivores following after them. “One of the most common extinction theories is that an asteroid 4-9 miles (10 km) wide struck the earth on the tip of the Yucatan Peninsula, in the Gulf of Mexico dealing the dinosaurs a fatal blow.” Or scientists say that they all have evolved into birds. The scientist also think maybe diseases might have killed of the dinosaurs. Scientists say that as the Cretaceous period went on more and more land bridges were appearing. So the oceans were drying, and dinosaurs were able to walk across land they used to not be able to walk on.