Why did the dinosaurs die?

Answer 1

What that guy said, plus it was gods will.

Answer 2

In the 1980s it was suggested that a huge extraterrestrial object collided with Earth 65 million years ago, and is now the leading explaination for the demise of these creature. According to this idea, a 10- to 15-km wide asteroid or comet struck Earth, releasing as much energy as 10 million or more of the largest hydrogen bombs humans have ever constructed and kicking huge quantities of dust high into the atmosphere. The dust may have shrouded our planet for years, virtually extinguishing the Sun's rays during this time. On the darkened surface, plants could not survive. The entire food chain was disrupted, and the dinosaurs eventually became extinct.

Answer 3

A new theory about Extinction of Dinosaurs
The extinction of dinosaurs and earth surfase gravity increase.
http://www.geocities.com/ramin1102000/chap3-1page.html

Despite the progress of science in different scientific fields, there are so many unanswered questions about paleontology, geology and zoology. So many theories have been posed to answer this question, but they could not be accepted by scientists, as they should be. These kinds of question include: the causes of the extinction of dinosaurs, the causes of extinction of different species of animals in past era, the causes of the extinction of primitive giant plants belonged to carbonifer period, the causes of having small bodies for some animals and large bodies for the others, the reason why animals can not grow more than their present size and which factor prevents them to grow more, the reason, why some sea mammals come to coast and die there, the causes of physiologic changes when the gravity is zero, the causes of eruption and outflow of molten materials from the ocean beds, the causes of insufficient growth of some animals and their early sexual maturity and other questions like these.

These are the questions, which are not answered by scientists of different sciences. Although they have tried to solve them with detailed and long experiments, but they could not find clear and simple answers.

The theory of the increase of gravity tries to find satisfactory answers to these questions by using the phenomenon of increase of gravity and by citing evidences. Obviously, a theory is not able to solve all the problems clearly and without mistakes, at first, and they need more discussion and criticism to be solved. However, this theory tries to find logical answer to these questions as far as possible.
So far there have been no discussion that whether the gravity has changed by the passage of time or it has remained unchanged. And so far no one claimed that the gravity have been unchanged and fixed during the past periods up to now. May be it is better to have a careful look at this theory and consider the evidences and proofs carefully, perhaps this theory can be able to pave the way for us and help us and help us to reach our main goal which is the improvement of our knowledge.

Answer 4

The K-T event

The K-T event is a mass extinction, the 2nd largest ever (to the Permo-Triassic) is famous for the large bolide (extraterrestrial object) impact that occured off the Yucatan, creating the Chixulub crater. Glass from the crater is dated to 64.98 +/- .01 million years ago.

This event caused global devistation, evidenced by:
1) Differing Sr ratios from global wildfires
2) Microdiamonds from fried Carbon
3) Tsunami deposits found all over the southeast US
4) Stishovite (a variety of quartz which forms in extreme pressures)
5) Worldwide Iridium anomaly. Ir is usually found abundantly in space, but it is very rare on earth. All over the world, at the K-T layer, the amount of Ir is much higher than normal.

It is theorized that the impact created magnitude 12 earthquakes and blocked the sun for as long as 9 weeks.

Answer 5

2 theories but all catastrophic

1) Collision with an asteroid and destruction of all plants due to a lack of sun to the earth. first grass eaters die after the meat eaters

2) Volcanoes erupted . The ashes prevent sun rays to reach the earth. Death of plants , death of herbivores, death of carnivores

Answer 6

Meteor impact changed global conditions drastically, and there were other changed going on as well. Remember, this did not happen over night, it took millions of years. Not all of them died out quickly, some were eliminated by natural selection.

Answer 7

They didn't, you fool! Haven't you ever noticed that birds are basically very small dinosaurs? Only ornithiscian dinosaurs went extinct. I mean, hello! They teach this in nursery school!


MORON

Answer 8

I read on the news , only yesterday, that it was because a huge meteor slammed into Earth

Answer 9

Smoking tobacco.

Answer 10

Because you touch yourself at night.

No, seriously, QFL has it right-meteor.