Why did the dinosaurs die out?

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