what killed all the dinosaurs..was it disease or an asteroid ?

Question

did they all die straight away or did it take along time..hundreds of years before they all died ?

Answer 1

Various archaeologists and paleontologists feel that the dinosaurs were killed by the effects of a massive asteroid entering the atmosphere and smashing into the earth. This event, named the "K-T Extinction," (K-T stands for "Cretaceous-Tertiary") is believed to have happened around 65 million years ago, and it killed all of the dinosaurs. A huge asteroid is believed to have hit the Earth in the Yucatan Peninsula in present-day Mexico. When it hit the Erath, it is theorized that it released Iridium, a highly radioactive element, which poisoned all of the dinosaurs and most other species at the time. It also released soot into the air. Soot is just a fancy name for airborne dust and dirt, and this made the Sun seem darker, killing most plants. The dinos didn't all just die at one time (the ones who got hit did), but over the course of about 20 years, they all died out. Some dinosaurs are believed to have evolved into the ancestors of modern-day birds, if you believe in evolution.

Answer 2

No they did not all die straight away. If a comparable asteroid hit the Earth today, it would wipe out all life within a few thousand mile radius of the impact site, but it would take time for life on the other side of the planet to feel the effects.
It's likely that, if the asteroid impact was responsible for the extinction, that the dinosaurs died out gradually due to the effects of the impact. These would have included a "nuclear winter" (although without the radioactive fallout) where the whole planet would have been shrouded in a blanket of ash-cloud, drastically cooling the planet and killing off most plant life in weeks.

It may have been many years or even centuries before the last of the dinosaurs died.

Answer 3

An asteroid hit the Earth.
The impact threw so much dust into the upper atmosphere that it blocked the sunlight and lowered the mean temperature world wide.
This rapid climate change caused the death of the plants that herbivorous dinosaurs fed on so they starved. The predators quickly followed. The large dinosaurs died out because they could not get the large amount of vegetation they needed.
The small mammals and some small dinosaurs survived due to lesser food requirements.
With the exception of a lizard type creature in New Zealand, dinosaurs evolved into birds.

Answer 4

Climate change induced by massive volcanic activity.
BTW, it wasn't just the dinos that died by the end of the Cretaceous, there were many land plants and sea critters that died out, too. And they didn't all die out at the same time - definitely not in a short period of time over which an impact event would influence climate (i.e., years) - It took hundreds of thousands of years - and this is exactly what the fossil record shows. (Hundreds of thousands of years is geologically fairly quick, but not catastrophic as we humans think of it.)
See links below.

Answer 5

One of the most likely possabilities, not often mentioned.

The meek shall inherit the earth.

A small mammal like a mouse. Small enough to go unseen but large enough to eat the eggs that are left on the ground. The only survivers were the ancestors of birds that laid there eggs up in trees where the mice could not easily get them.

Answer 6

Aliens killed the dinosaurs.

Answer 7

I believe the dinosaurs all died due to global cooling.

They should have known tho, because the concentration of CO2 in the atmosphere was dropping. Too bad they didn't listen to Al Goreonnasaurus.

Answer 8

i believe it takes some time..
it could be disease/asteroids and probably they're killing each other for food, territory etc..
and there's a really low chances of survival for dinosours after the development of various different modern species such as humans..they tend to kill each other and obviously the humans have won =p
as a result of geographical factors and human intervention, dinosours became extinct

Answer 9

If there were some event that could kill all the dinosaurs why wouldn't this event kill off other animal and plant life as well? If many animals today were mutated from dinosaurs, how could this happen if they were all dead? Dinosaurs are a falsity created by evolutionist.

Answer 10

hmmmmmm.......

we don't know

theories include but not limited to the following

1) asteroid/ large object from space hit and destroyed most large life

2) sudden climate change

3) maybe disease? although haven't heard that one