what killed dinosaurs?

Answer 1

We knew that dinosaurs went extinct some 64-66 million years. Many wild ideas about how the dinosaurs were rendered extinct were presented over the years but it remained a mystery.The researchers kept on making hypothesis yet cannot be given conclusion beacause of the followung reasons: the fossil record are not perfect,extinction is not a simple event, determining the age of rocks or fossils that are millions of years old is not easy,and it is difficult to understand the paleoecology of a region at a specific time in the past. Many hypotheses about dinosaur extinction sound quite convincing and might even be correct, but, as you know, are not really science if they cannot be proven or disproved. If extinct animals were wiped out by some catastrophe, couldn't that just as easily happen to us? Could we be found as fossils someday, and would no one know why we died?

Answer 2

There are dozens of theories to explain a probable cause or causes. Throughout the Mesozoic Era, individual dinosaur species were evolving and becoming extinct for various reasons. The unusually massive extinction at the end of the Cretaceous exterminated the last of the dinosaurs, the flying reptiles, and the large swimming reptiles, as well as many other marine animals. There is now widespread evidence that a meteorite impact was at least the partial cause for this extinction. Impact craters are visible on most planets in our solar system. A spectacular example of this was witnessed in 1994, when Jupiter was struck by a series of cometary fragments. Some of these impact blasts were larger than the Earth's diameter. Other factors such as extensive release of volcanic gases, climatic cooling (with related changes in ocean currents and weather patterns), sea-level change, low reproduction rates, poison gases from a comet, or changes in the Earth's orbit or magnetic field may have contributed to this extinction event.

Answer 3

Exact cause it not yet established officially.
The guesses are:
1. A comet - It brushed past the earth's atmosphere generating extensive heat which remained for several hundreds of years and killed all the dinosaurs.
2. A meteor- It struck generating extensive heat which killed the dinos.
3. Ice-Age

Other causes could be:

4. An epidemic broke out which spread thru this particular species ( like the recent bird flus etc) - this cause seems to me to be the most logical. In 90's, over 90% population of the vultures in India vanished due to a viral infection which spread thru them. No other bird was affected by this virus.

5. Records are available on the extinction of some species in the recent past like Dodos etc. The reasons for their extinctions can be associated with those of dinosaurs.

Answer 4

There are 3 levels of their extinction:

First of all, the bigger, stronger and faster dinosaurs literally ate the ones who were smaller, weaker and slower.

Next group, the tall ones with long necks slowly became extinct because the great heats burned all the trees and plants, which were their favorite meals, so they starved to death.

Finally, "the survivor group" really didn't have any luck, as they lived exactly at the time when the gigantic meteor hit the Earth and basically killed every living species, together with them.

Answer 5

The meteor shower and the changing climate brought about the dinosaur extintion.

Answer 6

Extinction

Answer 7

Meteor

Answer 8

Well, I would say a crater or two. Natural selection kept those that could fly above the cloudiness.

Who knows for sure?

Answer 9

Boredom... not a whole lot to do back then, just hide and seek. Depending on how far along the food chain you are, decided how exciting it could be.

Answer 10

A comet 65 million years ago.