Well, since no one know absolutely for certain what happened to them, you will hear different stories, but my opinion is that after the flood, there was a drastic climate change and the dinosaurs died off because they werent able to adjust to it. Also, they could have been hunted to distinction.
Why do you think there are definite answers for questions especially when they occurred so long ago? We don´t even know much about common things like the evolution of flowers. It makes my head ache sometimes. I did some research on Palm trees recently and made a big discovery called the Fertile Leaf Theory (published in magazines like Sarracenia etc.). Many dinosaurs did not die out but continued to evolve into mammals and birds. A chicken or turkey is very like T-Rex in body plan and even has the claws and scales on the legs.
It was actually a combination of many things! Prominent among these was the Chicxulub meteor as well as a great deal of volcanic activity around the globe. One common mistake that most people make when they are learning about the Cretaceous-Paleogene extinction is that they assume it all happened at once. Actually, this extinction event happened over several hundred thousand years, with a few species dying out at a time, which, overall added up to be a major extinction event. While many organisms would have been killed near the impact zone from the meteorite, as well as in the regions nearest to the volcanic eruptions, there is no one thing that is solely responsible for this extinction.
A very complicated substance over which was overheated and smothered everything and anything, possibly with an explosion that flew over long distances, covering everything with a layer of smoke and dirt, some several hundred thousand years from now, suffocating, destroying and eliminating any organism within a few hundred mile radius, out of which everything had to evolve from otherwise we wouldn't exist. So, um, yeah, take your pick.
asteroid. i dont think so. there are evidences which describes the taming of dinosaurs by humans. the reason must be either starvation, flood or any other event of gradual extinction. but its not mass extinction that killed those dinosaurs.
The world ended in fire the first time which is how the dinos died. Fireballs hit earth and wiped them out. Next it ended in water which is where Noah's Ark comes in. Next it will end in war (hint: whats happening right now?)