Dinosaurs

No. By the time the dinosaurs went extinct mammals still played a relatively minor role ecologically. It is generally accepted that an asteroid or comet struck the earth, causing ecosystems to collapse worldwide and resulting the extinction of many groups of animals including the dinosaurs.

Ferns, conifers, and cycads are types of plants commonly associated with dinosaur fossils, as they were dominant during the Mesozoic era when dinosaurs roamed the Earth. These types of plants often left behind fossils along with dinosaur remains, providing insights into the ancient environments where they coexisted.

Yes, earthquakes and tremors did happen back then, possibly even more frequently than they do today. When the dinosaurs first started out, the world was one large ocean (the Tethys) and one large continent. (Pangaea) At the end of the cretaceous, when they died out, the major landmass had split into seven major landmasses or, in the case of North America and Europe, groups of islands. The events that made this happen; tectonic movement or earthquakes.

The event that was marked by an asteroid hitting the Earth 65.5 million years ago near modern day Chixulub in the Yucatan Peninsula in Mexico is known as the K-T or Cretaceous-Tertiary Extinction Event.

No you are not a dinosaur. Human beings are mammals which have a completely different evolutionary path to dinosaurs.

Mammals evolved from a subclass of reptiles called synapsids (mammal like reptiles). Archaeothyris the 1st undisputed synapsid dates back to 305 million years ago during the Carboniferous Period. Synapsids went on to dominate the world until the end of the Permian Period about 251.4 million years ago. During the Triassic Period about 200 million years ago the 1st true mammals appeared.

Dinosaurs on the other hand evolved from a completely different branch of the reptile family the archosaurs. Archosaurs 1st evolved during the Permian Period 299 - 251 million years ago. They lived in the shadows of synapsids until after the Permian-Triassic Extinction when they started to overtake them as the dominant animals on Earth.

Archosaurs went on to evolve into 3 different branches :- dinosaurs (about 230 million years ago), pterosaurs (about 220 million years ago) and crocodilians (about 200 million years ago). Most species of dinosaurs were to die out 65.5 million years ago but one branch of therapod dinosaur was to survive and still lives until this day, the birds.

About 65.5 million years ago. The Cretaceous and Tertiary are geological time periods either side of this event. The event is significant because there was a large mass extinction event at this time including the extinction of all non avian dinosaurs. Most experts agree that the cause of the extinction was a asteroid impact.

No, Stegosaurus was a herbivorous dinosaur. It primarily fed on plants like ferns, cycads, and conifers during the Late Jurassic period.

Birds are believed to have evolved from theropod dinosaurs during the Mesozoic era. The fossil record shows a gradual transition from small, feathered dinosaurs to early bird species, which eventually led to the wide diversity of bird species we see today.

Dinosaurs became extinct 65 million years ago, at the end of the Cretaceous period.

of the catastrophic environmental effects triggered by the impact, such as massive wildfires, darkness from dust blocking the sun, and disruption of the food chain. This led to a global-scale extinction event known as the Cretaceous-Paleogene (K-Pg) extinction.

Most mammals were much smaller than the dinosaurs and they were therefore better able to adapt to the conditions that brought the dinosaurs down. For example, a large dinosaur that ate vegetation would have died very soon if most vegetation was wiped out in a catastrophic event. Small mammals could still dig and forgage and make do with roots. It must have been horrific for everything alive at that time, but the very small creatures had the edge.

It is not a "who" but a what that killed off the dinosaurs. It is thought that an asteroid hit the earth causing a prolonged winter which killed off all the plants so they starved to death and died.

The length of a day 500 million years ago was about 21 hours.

The currently accepted theory is Luis Alvarez's asteroid impact theory. However, this might not have been enough. Many scientists believe that the impact was only part of the reason non-avian dinosaurs became extinct.

Answer2: Listing some speculations as to what happened to them, Princeton scientist G. L. Jepson stated:

"Authors with varying competence have suggested that dinosaurs disappeared because the climate deteriorated . . . or that the diet did. . . . Other writers have put the blame on disease, parasites, . . . changes in the pressure or composition of the atmosphere, poison gases, volcanic dust, excessive oxygen from plants, meteorites, comets, gene pool drainage by little mammalian egg-eaters, . . . cosmic radiation, shift of Earth's rotational poles, floods, continental drift, . . . drainage of swamp and lake environments, sunspots."-The Riddle of the Dinosaur.

It is apparent from such speculation that scientists are not able, with any certainty, to answer the question: What happened to the dinosaurs?

University of Arizona scientist David Jablonski concludes that 'for many plants and animals, extinction was abrupt and somehow special.Mass extinctions are not merely the cumulative effects of gradual dyings. Something unusual happened.' Their arrival was also abrupt. Scientific American observes: "The sudden appearance of both suborders of the pterosaurs without any obvious antecedents is fairly typical of the fossil record." That is also the case with dinosaurs. Their relatively sudden appearance and disappearance contradicts the commonly accepted view of slow evolution.

The Cambrian period is also called the "Cambrian explosion" due to the sudden appearance and diversification of many major animal groups.

West Virginia 100 million years ago would have been part of a shallow seaway, so you would find marine sedimentary rocks like limestone, sandstone, and shale. Fossils of marine life such as ammonites, bivalves, brachiopods, and possibly marine reptiles like mosasaurs might be discovered in these rocks.

It is generally assumed that the ratio between brain size and body mass is an indication of intelligence.

Although this is not strictly true it is generally true. Humans certainly have the highest ratio of brain to body.

Troodon had one of the largest brains of any dinosaurs in comparison to its body therefore it is generally assumed it was intelligent.

There are over 1,000 species from 500 genera of extinct, non avian dinosaurs that have been found, which is estimated to only be a tiny fraction of the species that did exist. However, birds are considered dinosaurs. Today, there are over 10,000 species of birds that have been discovered.

Petrified wood is usually silicified. Specimens could be washed with a mild detergent, small brush and plenty of water and left to dry naturally. Most petrified wood would be naturally resistant to weathering.

The Archosaurs were considered the dominant land animals of the Jurassic Period. These include all non-avian dinosaurs, crocodilians, and pterosaurs. It is generally believed that their modern descendants are modern birds and crocodiles, alligators, caimans, and gharials.

Mosquitoes in modern time are know to pass parasites and deceases. This was also probably true in ancient times as well, maybe some kind of dinosaur malaria.

However although this may have contributed to the deaths of individual dinosaurs (there is absolutely no evidence for this) it is not thought that this is a contributing factor in the extinction of all non-avian dinosaurs.

Most telling is the extinction of the large marine reptiles such as mosasaurs. Since they were completely aquatic it is unlikely that mosquitoes could have caused their extinction. Another clue is the lack of extinction of small animals. Mosquito born diseases would not have just attacked the larger species and leave most of the smaller ones alone.

The most popular current theory suggest that at the end of the Cretaceous saw a great increase in volcanism. This would have changed the environment causing climate change and also would have "poisoned" the environment. The non-avian dinosaurs were living in a dying world. To make matters worse a 6 mile wide asteroid hit the Yucatan Peninsula in what is now Mexico. This caused global fires as rock ejected into orbit by the asteroid started to fall back to earth. It also caused a "nuclear winter" which made many species of plants to die out.

This was just too much for dinosaurs and other animals to cope with. Mostly the only animals that survived this extinction were all under 10kg. They perhaps were animals that lived underground or where able to shelter away from the fires.

Typesof dinosaur is called: omnivores, herbivores, and carnivores. A carnivore is a dinosaur that eats meat only and they usally have sharp pointy teeth to tear the meat apart. A herbivore is a dinosaur that only eats plant, these dinosaurs have flat teeth. And last but not least a herbivore is a dinosaur that eats both plants and meat. These dinosaurs have flat and sharp teeth, but we humans that are omnivores have more flat teeth than sharp, because we dont have to tear meat likedinosaurs did........... YOLO

A paleontologist specializing in prehistoric sea creatures is often referred to as a marine paleontologist. They study the fossilized remains of ancient marine life to understand the evolution and biodiversity of organisms that lived in ancient seas.