Dinosaurs

They probably didn't. Those with feathers probably retained them into adulthood, and at least one very large theropod is known to have sported feathers.

AMPHICOELIAS

The Tyrannasuras rex has the big jaws and is smart, a stegasauras is not vary intelligant. a tricara tops is inbetween. The tyrannasuras res is smartest.

carnivores

it can be spinosaurus giganotosauru or carcharodonthosaurus

Nope. Dinosaurs went extinct about 65 million years ago. Modern humans evolved only about 200 000 years ago.

Scientists found deinosuchus bones in a large dried swamp in East Texas. They guessed that this alligator giant was adapted to live in large, quiet swamps of the prehistoric era. It's also likely they resided in rivers and lakes, big and deep enough for them to lie in wait for potential prey.

They lived all over the world - of course, there were no countries back then.

The only real flying dinosaurs are birds, which can cause injuries but couldn't kill a person. What I believe you are referring to, however, are pterosaurs, which were not dinosaurs, but were flying reptiles. Most pterosaurs would have been the size of medium to very large birds, and would not be capable of killing a human. Some of the biggest pterosaurs include Pteranodon, Geosternbergia, and Quetzalcoatlus. Even though Quetzalcoatlus, the biggest of the three, had a wingspan of 33 feet and stood taller than a giraffe thanks to its long neck. However, it still weighed less than 550 lb. It might be capable of killing a human, but it's unlikely that it would have hunted prey as large as a human. As for Pteranodon and Geosternbergia, they ate fish, not terrestrial animals. Overall, I'd say large pterosaurs could defend themselves against humans, but would not attack them unprovoked.

While there's no definitive evidence to confirm that dinosaurs engaged in play as humans do, some scientists suggest that certain behaviors observed in modern animals, such as social interaction and mock fighting, could indicate playful behavior. Fossil evidence, such as tracks suggesting social movements or juvenile dinosaurs found in groups, may imply some level of social interaction. However, without direct observation, it's challenging to determine the extent or nature of any playful activities among dinosaurs.

head $50,000,000 leg $750,000 body $500,000,000 arm $250,000

There are only 7 Archaeopteryx fossils, not enough to tell for certain whether they were solitary or not.

On the contrary, they lived, as a group, quite a long time. Typically, a species lasts about a million years; some dinosaurs remained little changed for as much as 30 million years, and as a clade, they endured over 130 million years.

Not unless you count birds, which most paleontologists consider to be dinosaurs. Non-avian dinosaurs died out 65.5 million years ago.

It is a group of duck billed dinosaurs that may fly.

Sharks are still in existence, while dinosaurs became extinct long ago.

Triceratops might be a carnivore. Studies on the teeth of a triceratops shows that they were good for grinding plant materials, and were also good for crushing bone and meat. It has not yet been proven that triceratops was a carnivore, or an omnivore, but it was most likely a herbivore.

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In the cosmic calendar, which compresses the history of the universe into one year, 350 million years ago would fall around early December. This period corresponds to the late Paleozoic era, specifically the time when the first forests were appearing and early amphibians were evolving. It highlights a significant transition in Earth's biological history.

Ocean is water mixed with salt and many other stuff.

Yes They have been on earth for 450,000,000 years, that's longer than dinosaurs

none dinosaurs are extinct

You're probably thinking of Pachycephalosaurus, a dome-headed dinosaur, although there existed other members of its clade, such as the dinosaurs Homalocephale and the recently discovered Dracorex.

They are both large, carnivorous dinosaurs (comparable in size to T-rex.) They also both belong to the same family (Carcharodontosauridae), but they are members of different subfamilies. In other words, they are similar but not the same thing.

115 feet long.