Dinosaur Extinction From Disease

One of the several theories that led to dinosaur extinction is the widespread of diseases. It has been stated by this theory that during the Cretaceous period, more and more land bridges come up on earth with the lowering of sea level at the end of the Cretaceous era. Because of the drying up of the bodies of water, dinosaurs would walk across this new land to search for food and find some relatives of their own. Every population of dinosaurs had its own parasites or diseases in which they developed immunity but when mixing with the other species of dinosaurs, it had become fatal. Migration allowed the dinosaurs to reach different places all over the world together with the widespread of various diseases they carry along. These types of disease where transferred from generation to generation and then later evolved to be a stronger and a more deadly ailment. For some species, the parasites made them stronger to combat other forms of illnesses but for some, it might not had been that way. Furthermore, marine species died out because they were usually the preys of larger dinosaurs since they were easily captured due to drying up of the ocean. Still, smaller animals were spared out from the epidemic disease because they were not capable of long migrations compared to bigger animals.

In addition to this, an essential contributor to the demise of the dinosaurs could have been the evolution of insects during the end of the Cretaceous period. During these times, the world was experiencing a warm temperature weather which is perfect for the growth and development of most blood-sucking insects carrying leishmania, malaria, intestinal parasites, arboviruses and other pathogens. The rise of disease-carrying insects has infected several dinosaurs all over the area and made them sick with no possible cure.