Dinosaurs

A typical amphibian lives on the land until it is time to breed and lay eggs, when it returns to the water.

How were dinasuars made into toys and foods??? Do you like donuts cause dinosuars sure did intill they became extinct.

Most of them died by the Cretaceous period.

Those that survived evolved into some of the creatures we see today.

They were jawless fish that lived during the Paleozoic era

Stunningly some of our oldest ancestors came from ostracoderms!

Some people argue that the meteorite that crashed into the earth to kill most if not all dinosaurs. But others also suggest that dinosaurs were killed by bacteria that had developed to get past their immune systems.

They did go extinct but that does not mean they were a failure, because they dominated the Earth for more or less, 160 million years. The changing climate and the asteroid impact that lead to their demise was simply something they couldn't stop.

Modern crocodilians evolved 83.5 million years ago, long after the dinosaurs first evolved. However, primitive animals superficially similar to crocodilians existed since long before dinosaurs evolved.

You are thinking of diffrent things. The big bang was a giant explosion that allowed all the dust and debris from that to come together to form earth. Billions of years later was the dinosaurs thing

The late-Cretaceous theropodan dinosaur Carnotaurus sastrei was found in Patagonia, Argentina by Jose F. Bonaparte, who described it in 1985.

When the dinosaurs lived, there was only one enormous continent known as Pangea (some people spell Pangea "Pangaea").

About 250 million years, from 300m to 65m, spanning three periods(Triassic, Jurassic, and Cretaceous

Most dinosaurs are found underground, however they are not living.

Good work this is a hard question to answer all because all dinosaurs can be harmful in there own way but if you would have to pick i would say heterodontosaurus may have to be my pick of least harmful, A. its a plant eater B. its smaller then us C. if they were alive today and you were able to spot one it would run away.

China

Some dinosaurs ate meat, and some ate plants. Plant eaters included Triceratops and Apatosaurus, and meat eaters included T-rex and Velociraptor. There were also a few that ate both plants and animals, and these included Ornithomimosaurs and Oviraptors.

You can see it on the dinosaur's tooth, too. A curved, sharp tooth indicates a meat eater, and a flat, broad tooth or a leaf-shaped tooth is that of a plant eater.

During the Triassic and Jurassic, Wisconsin was an inland area and above water. During the Cretaceous, the Western Interior Seaway submerged the center of North America from Hudson Bay to the Gulf of Mexico, dividing the continent. Wisconsin was on the eastern shore of the Western Interior Seaway, but it was above water.

Amargasaurus was among the smallest sauropod to ever walk the earth,so it was an easy target for predators,and at that time their were the most carnivores than any time period,so the spikes on the neck made the Amargasaurus look bigger and deadlier than it actually was.

a HUGE ANCIENT SCARY SUPER BIG HORRIFIC SEA MONSTER. it lived in the dinosaur times.. and its soo big and and scary omg.. i, being 5"5 would be about the size of its fin and its fin compared to its body is like a finger to an arm, man!! its craazy. they have a big loong face with looots of teeth.. (to give image.. a full grown big one is bigger then a blue whale.. blue whales are the largest animals on the planet i think..)

They had teeth that were constantly replacing used teeth. They had about 1,000 teeth. But not all at the same time!

They probably could replace a tooth about 6 times.

Despite popular belief, most recent evidence suggests Sauropod dinosaurs likely couldn't exceed 100 years. In fact, the oldest known sauropod that scientists were able to properly age was a very large Apatosaurus specimen that was only 48 years old when it died. Almost all other Sauropods that have been aged have been found to be younger than this Apatosaurus, so century long lifespans seems very unlikely.

Instead, an average lifespan might be somewhere in their 40's or early 50's, although I could imagine some larger species of Sauropod reaching fairly old ages of 60 or even 70 if the conditions were correct.

The longest plant eater was the Seismosaurus measuring 34 metres long and it weighed as much as six elephants!

Lapparentosaurus, those very long neck dinos who eat plants off of trees.

where the dinosaurs are found.

i think the sky was always blue...

yes, the coelacanth is older than the dinosaurs.