Dinosaurs

Mos species of dinosaur walked on 4 legs, but some, including all carnivorous dinosaurs, walked on 2 legs.

the simple answer is: no.

whales are mammals that evolved in the Cenozoic era. dinosaurs predate whale evolution, and existed in the mesozoic era.

to give an idea: the last dinosaurs died out 65 million years ago.

this is the end of the mesozoic era. it's typically referred to as the K-T boundary, and the cataclysmic event that caused this extinction is usually called the K-T event. K for cretaceous, T for tertiary. that doesn't make much sense until you realize that; C is for Cambrian, and the K was chosen by German scientists.

whales are thought to have evolved from an ancestor similar to modern day hippos (this means both whales and hippos can be traced back to a common ancestor) about 54 million years ago. that's at least 11 million years after dinosaurs died out.

what can happen in millions of years? a lot.

the ambulocetus ("walking whale") formed about 50 million years ago.

the protocetus ("early whale") appears around 45 million years ago.

the basilosaurus ("king lizard") rather unfortunately named, lived between 40-34million years ago.

you can find many more forms, and as we get to 15 million years ago, you find creatures that look very similar to our toothed whales (dolphins, orca, etc.) and you find creatures that look very similar to our baleen whales (humpbacks, blue whales, etc.) by this point, all traces (aside from some vestigial bones) of legs are gone. hands look like flippers. the "melon organ" for echolocation is present.

it kind of makes you wonder what future evolution holds.

Strictly speaking, the sea lizards were NOT dinosaurs, but their contemporaries. The largest of these was probably the Liopleurodon. An even bigger creature, Basilosaurus, was, despite the name, not a sea lizard, but a whale.

Dinosaurs ate a variety of things - it depends on the type of dinosaur. Some were herbivorous and ate plants, others like T. Rex were Carnivorous and predated on other organisms. Some smaller dinosaurs were insectivores.

No. Dinosaurs are relatively recent animals in the history of earth. There were other animals around hundreds of milliions of years before dinosaurs, including multitudes of primitive sea critters, insects, fish, amphibians, and reptiles.

Dinosaurs are a group of reptiles that are most well known for having lived in the Mesozoic era from about 230 million years ago until and extinction even 65.5 million years ago. Some of the dinosaurs of the Mesozoic were the largest animals every to live on land. The largest of them long-necked herbivores called sauropods were comparable in size and weight to whales. The first dinosaurs were two legged animals. While many evolved back into a four legged posture two groups, ornithopods and theropods remained on two legs. The theropods included all carnivorous dinosaurs. Among these were animals such as Tyrannosaurus, Spinosaurus, and similar sized animals which were the largest of all land predators.

Dinosaurs were initially though to have been sluggish and cold-blooded like modern reptiles. However, evidence now shows that many dinosaurs were likely warm-blooded, with active lifestyles and shared more in common with birds than with modern reptiles. Contrary to popular depictions more and more dinosaurs, most of them small theropods such as velociraptor, are being found to have had feathers.

Through studying fossil records paleontologists have found that birds are actually dinosaurs that evolved from small theropods. So it is now known that dinosaurs are still around in feathered form.

The tallest herbivore dinosaur was Sauroposiden.
At 56ft high and 98ft long Sauroposeidon is the tallest and one of the longest dinosaurs in the world, only then to be beaten by Argentinosaurus. Don't believe me go check it out on Wikipeidia.
A Dinosaur called Brachiosaurus, Was once the tallest Dinosaur. But now the Highest is one called Sauresposeidon.

One example of a dinosaur with 12 letters in its name is "Stegosaurus." Stegosaurus is a herbivorous dinosaur known for its distinctive plates along its back and spikes on its tail. This dinosaur lived during the Late Jurassic period, around 155 to 150 million years ago.

No. Cavemen and dinosaurs never co-existed meaning they didn't work together. They lived at different times, dinosaurs then cavemen. If they did, the carnivore dinosaurs would of eaten the cavemen and of those that are herbivores, they could be trampled to death.

No. The dinosaurs (with the exception of birds) became extinct 65.5 million years ago. The first Ice Age began about 2 million years ago, which was 63 million years after the dinosaurs had died out.

yes, T-rex could only walk on two feet because it's front arms/legs were very tiny.

In Canada and Scotland, not much. It was the middle of the most recent ice age and both those areas were covered in thick ice even in winter: no trees, no grass, no people. The tropics were more interesting.

Dinosaurs are extinct now.They lived before man and woman(known as humans)appeared.(Everyone knows that so you should too unless you want to test someone.)

There is strong evidence that an extraterrestrial object impacted near the Yucatan peninsula. There is also evidence that a boundary layer was formed that is rich in iridium. The most plausible origin of this iridium is an extraterrestrial impact. Below that layer, dinosaur bones are present and above that zone there are none. If I had to bet, I'd bet that the comet killed them by the effects of the impact.

To bite into prey or bite leaves, dinosaurs needed teeth. The T. Rex had the biggest teeth of all dinosaurs to deliver a killing bite to its prey. The sauropods had front teeth but no back teeth. The spinosaur adapted to eating fish and so had a mouth like crocodiles.

they lived like animals

Live was harder 100 years ago, but people were as civilized as they are now in most of the world. More people lived on farms than do today and electricity was not widely available in the country. Cars were just coming into common use. Roads were not very good as a whole. Community gatherings were the main source of entertainment. Long distance telephone service was poor and expensive so people wrote more letters. Local mail service was better in towns than it is now. Virtually every town had a railway station and they ran many trains that made many stops.

yes in fact some dinosaurs ate these spiders.

A person that hunts dinosaur bones is called a paleontologist.

From what I have researched (not too much) the Ankylosaurus lived alone in most cases but in some cases in herds

Hope This was useful

Dinosaurs were not invented. They evolved from a group of small, bipedal reptiles about 230 million years ago.

they take the body parts and sort of " fit them together" like a puzzle piece. Usually a big body goes with a big head. Most of its common sense, but also some of it is really complicated. =) hope this helped!

The Chinese name the Year after animals, not the month. Although March is generally linked to the Rabbit