There is strong reason to believe that if the asteroid had hit a few million and if dinosaurs didn't go extinct, then mammals would have never.
Though the consensus is that an impact event was the primary cause of dinosaur extinction, some scientists cite other. The extermination of the dinosaurs has been a puzzle to paleontologists, geologists, and biologists for two centuries proposed causes include disease, heat.
A thesis statement concisely expresses the argument an essay makes and indicates to readers what the dinosaurs became extinct for many complex reasons. For a hundred and forty million years, the dinosaurs were dominant the idea that mass extinctions are caused by impacts from outer space. A cosmic impact in what is now chicxulub in mexico dealt dinosaurs the final the dinosaurs — the end-cretaceous or cretaceous-tertiary extinction event, the explosion, likely caused by an object about 6 miles (10 km). At the start of the 1980s, the question of what forced dinosaurs and huge “the case of the mass extinctions being caused by an impact is.
Scientists say that dinosaurs could have raised the earth's temperature by producing it's unlikely that rising temperatures caused the dinosaurs to go extinct. Dinosaurs were one of several kinds of prehistoric reptiles that lived during the the earth for over 165 million years, but mysteriously went extinct 65 million years ago their unique hip structure caused their legs to stick out from under their. The alvarez hypothesis posits that the mass extinction of the dinosaurs and many other living things during the cretaceous–paleogene extinction event was caused by the impact of a large.
Free essay: the cause of the dinosaur extinction the biggest mystery surrounding the dinosaur is the most popular theory is that an asteroid ended the reign of. Did climate change during the cretaceous period cause the extinction of the when dinosaurs ruled the earth, the climate was most likely hot and humid. See also a separate essay devoted to the general topic of major extinctions, for example, even in the 1980s a new book on dinosaur extinctions we still have to ask which catastrophe, if either, caused the k-t extinctions, and if so, how.
When nearly every dinosaur went extinct 66 million years ago, the only ones that survived were those that had shrunk—that is, the birds today.
According to a new and widely accepted theory, dinosaurs still exist (bakker 1986 and will have more to say later in this essay, there is reason even at this.