Which event cost the dinosaurs to become extinct?

Answer 1

The correct answer is that no one knows.

A popular theory at the moment is that a large meteor struck the earth 65 million years ago. There is evidence of large meteor strike at a site called Chicxulub, near Mexico.

There are alternative theories such a volcanism. There are immense lava flows that date back to the time of the dinosaurs, indicating that volcanic activity was at a peak contributing to a climate change which dinosaurs could not survive.

Increased competition for resources from the growing mammal kingdom provides yet another theory.

There is evidence for all these theories, so it could just be the combined effect of all these factors that led to the dinosaurs demise.

Answer 2

The most widely accepted theory is that the continents began to split up, releasing much Carbon Dioxide and disturbances in the tectonic plates. During this time, a giant asteroid hit, the blast killing a few dinosaurs, but also causing several tsunamis and earthquakes across the earth. However, a huge ash cloud covered the earth, blocking the sunlight. In result, the food chain collapsed. The plants died, then the herbivorous dinosaurs, then the carnivorous.The few survivors were the scavengers, mammals, birds, smaller reptiles. Nothing too big. But, most paeleontologists think that the birds were the immidiate ancestors of the dinosaurs.

Answer 3

scientists arent exactly sure but think it might have been a metiorite well... it might be that but there were other reasons to their disapperance which were diseases, climate changes, and much more.

Answer 4

There are many theories as to how the dinosaurs became extinct, from ultraviolet radiation, to diseases or starvation. The one theory that seems most likely is the impact of an asteroid, about 65 million years ago during the end of the Cretaceous Period. This is also known as the K-T extinction, K standing for Kreide (chalk in German, this describes the sediment layer at that time) and T standing for Tertiary (The next geological period). The crater left by the said 'Asteroid strike of doom' is located in The Gulf of Mexico. However another possible impact site is under the Arabian sea and could have been part of a much larger crater, split up by tectonic shifts.