A meteor hit the earth and caused severe condition that organisms could not survive.
because they realised they were wrong.
scientist say the die because of a flood and a drought
mass extinction of the dinosaurs. The impact caused widespread environmental changes, such as cold and darkness due to dust blocking the sun, leading to a disruption in the food chain and ultimately the extinction of many species, including the dinosaurs.
The Cretaceous-Tertiary Extinction was a giant asteroid that hit Earth and killed many organisms. It formed giant dust clouds and enough heat to cause a worldwide fires. The fossils of the dead organisms gave out a story to the scientists who were researching them. For example, a meat-eating dinosaur ate a plant-eating dinosaur during the Cretaceous-Tertiary Extinction. Soon after the meat-eating dinosaur ate the plant-eating dinosaur, the meat-eating dinosaur died. The fossil of the plant-eating dinosaur and the meat-eating dinosaur told a story to the scientist about what the meat-eating dinosaur did to the other dinosaur; then the other story to the meat-eating dinosaur. You're welcome :) -Ashley G
A scientist who studies dinosaurs is called a paleontologist.
No one knows exactly how dinosaurs started to exist, but some people believe that they evolved from single celled organisms that lived in the oceans. Some scientist believe that dinosaurs might be related to lizards or to birds.
Palaeontologists study fossils and dinosaurs.
Birds evolved in the late Jurassic Period about 150 to 145 million years ago. This was about 90 to 95 million years before the asteroid impact that marked the K-T extinction event.Just a sub note that most scientist recognise that birds are a specialised branch of the therapod dinosaur. Birds are dinosaurs in the same way cats are mammals.
Mainly archeologists and biologists.
Paleontologist.
Dinosaurs have long been extinct, making it impossible for scientists to work with living dinosaurs.
Because they are alive today, birds are dinosaurs. And because of fossils.