Dinosaurs

As far as I know, there were three types of large ceratopsians that had frills but no horns. They were Pachyrhinosaurus, Vagaceratops, and Achelousaurus.

The Cretaceous period ended as the result of a mass extinction event, probably resulting from an asteroid impact. This wiped out 65 percent of life on earth, including the ammonites, the plesiosaurs, the pterosaurs, and, most famously, the dinosaurs.

They would probably become the dominant group of animals on Earth again. Basically, that means humans would be killed off and non-human mammals would at least be massively diminished, in short order, but that doesn't mean that all large mammals will be effected by the ancient reptile's return, some like horses, bison, buffaloes, hippos, rhinos (depending on a species, white rhinoceroses are most like rhinos that could survive with the dinosaurs), wild pig species, mongooses, civets, fossas, bats, platypuses, echidnas, deer species, bears, wild goat/sheep species, elephants, giraffes, antelopes, cats, foxes, camels, hyenas, wolves, lemurs, monkeys, apes, rabbits, tapirs, kangaroos, wallabies, wombats, Tasmanian devils, and some other animals might still rule in large numbers, even with dinosaurs present.
Then mammals wouldn't be the only animals that rule the land, so both mammals and the ancient reptiles would probably rule earth together (much like in the book called "If dinosaurs were alive today".

- Life Before Dinosaurs) is a three-part Britishdocumentary film series about life in the Paleozoic, bringing to life extinct arthropods, fish,amphibians, synapsids, and reptiles.[1] As with previous Walking with... installments, it is narrated by Kenneth Branagh, and by Avery Brooks in the American version. Using state-of-the-art visual effects, this prequel to Walking with Dinosaurs shows an epic 300 million year war between creatures before the dinosaurs. The series draws on the knowledge of over 600 scientists and depicts Paleozoic history, from the Cambrian Period (530 million years ago) to the Early Triassic Period (248 million years ago). It was written and directed by Tim Haines. As with some of the other BBC specials, it was renamed in North America, where its title was Before the Dinosaurs: Walking with Monsters. It has also aired as a two-hour special on the Canadian and American Discovery Channel with yet another narrator. At the 58th Primetime Emmy Awards in 2006 it won the Emmy Award in the

scientist think that a huge meteriod hit earth some dinosaurs died.the merteriod killed all plants the meats eaters died of hunger and the plant eaters died of hunger too.the meat eaters died because their food wich was the other dinosaurs died.the plant eaters died because the plants died of the metriod

Dinosaurs filled many niches in their habitats. Many were large herbivores, preventing plant overgrowth. Others were carnivores or insectivores, preventing prey animals from overpopulating. The dinosaurs that still exist, birds, fill many niches, including spreading seeds, insect and rodent control, and pollinating flowers.

Dinosaurs became extinct between 70 and 65 million years ago.

It is thought the most probable cause of the mass extinction was climate change, possibly brought about by a collision with another heavenly body.

Reptilia.

Linnean classification of extinct animals is difficult and is always changing. Some paleontologists have advocated to create a separate class for dinosaurs, pterosaurs, crocodiles and birds called Archosauria (currently Archosauria is a subclass of Reptilia), although the prevailing opinion in the scientific community is that dinosaurs and their kin remain in Reptilia.

The only possible dinosaur fossils would be from marine species (fish) that survived the mass extinction of almost all dinosaurs.

The islands of Hawaii are relatively new in geologic terms (about 30 million years for the oldest part of the chain) while the age of the dinosaurs ended 65 million years ago.

All dinosaurs laid eggs, but we've only found eggs and nests for a few. However, all of the dinosaur eggs that have been found were laid in nests. Paleontologists assume that most, if not all, dinosaurs made some type of nest for their eggs.

Velociraptor was a small, carnivorous dinosaur. As such, it would have hunted small prey such as lizards and mammals all the way up to animals as large as Protoceratops. We have proof of Velocraptor hunting Protoceratops because there is a fossil of a Velociraptor and a Protoceratops that died mid combat.

Scientists do not know the exact lifespan of dinosaurs, but they estimate that they lived about 75 to 300 years. Animal lifespans relate in part to their body size and in part to their type of metabolism. Their possible maximum age can be estimated from the maximum lifespans of modern reptiles, such as the 66-year lifespan of the common alligator and the impressive lifespan of some tortoises.

One specimen of the now-extinct Black Seychelles Tortoise, which was an adult when captured, lived a record 152 years in captivity (1766-1918) and had an accidental death. These estimates, based on lifespans of cold-blooded animals, would be too long if dinosaurs had metabolisms more similar to modern birds and mammals.

Not a lot of skin has been preserved, but we assume it was much like that of modern reptiles. At least one dinosaur, the saltasaurus, have thick plates here and there imbedded in its skin, presumably for defense.

Ankylosaurus

Dinosaurs of the family Deinonychosauria, which means "fearsom claw lizards", posessed large switch-blade like claws on their feet, which they used to gash open their prey. http://en.wikipedia.org/wiki/Deinonychosauria

On what peninsula where dinosaur bones discovered?

they found the bones and fossils of the dinosaurs

It comes from a term in Greek called Dinosauria which means 'terrible lizard'

Carbon-14 has a half life of about 5,730 years, meaning that it can only date back to thousands of years old. also, the amount of carbon in the earth's atmosphere has been increasing since the beginning of time, so carbon dating is not a very good way to date fossils. Carbon dating only works on things that were once living.
Scientists have determined that it would take 30,000 years for the carbon to reach equilibrium, and that the earth is less than 1/3 to equilibrium, so it follows that the earth is less than 10,000 years old.

In order to propagate the species, most dinosaurs had to lay multiple eggs. They did this to make sure at least some of their babies survived predators and weather events.

Even though the dinosaurs were the most common species on the planet there were many large insects such as dragon flies and cockroaches that died out. Along with these were types of fish, plenty of bacteria, maybe some basic mammals, some primitive birds, and pterodactyls. I counted pterodactyls separate because even tough they look it. They were not dinosaurs.

Grazing dinosaurs typically roamed the savannas taking advantage of the ease of spotting predators and the plentiful grazing opportunities. These dinosaurs were typically herbivores and omnivores, rather than carnivores.
They lived everywhere.

parasaurolophus whas 14 feet and 5,400 lbs

Obviously BC. BC stands for "before christ", there were no dinosaurs walking around with jesus christ in the bible

Its mostly because of climate change. Example: the sea of Tetis (located where the Sahara stands today) was home for whales and megalodon (the giant shark). When continents shifted, whales moved north and south to colder waters where their food lived. Since whales were megalodon´s prey, and apparently the shark didn´t adapt to colder waters, it went extinct. Same thing could have happened to different species of dinosaurs. Just imagine changing vegetation, different weather, water availability, etc.