Dinosaurs

The Mississippian Period is an American term for what is known as the Lower Carboniferous Period in the rest of the world. It covers a time period extending from about 375 million years ago to the beginning of the Upper Carboniferous (Pennsylvanian) about 345 million years ago.

During the Mississippian period the first winged insects appeared and tetrapods were beginning to spread across the heavily-watered landscapes. Amphibians were beginning to occupy the land and insects, many of which grew to enormous sizes, were beginning to swarm everywhere. Because of the warm, damp climate that prevailed on most of the land areas, the world was heavy with plant life, no grasses had yet evolved, but there were others, mainly ferns, scale trees, cycads, horsetails, and a group of plants known as Archaeopteris. This latter group produced thick bodied trees that grew up to 20 feet in height and flourished in the marshes and heavily watered land areas - which were abundant. Plants, in fact, were so abundant that their photosynthetic mechanisms pumped oxygen into the air in enormous quantities, and estimates are that oxygen gas may have occupied as much as 30-35 percent of the atmosphere (today it's closer to 21 percent). That much oxygen in the air permitted insects and other land-dwelling invertebrates to grow to enormous sizes. Dragonflies with wingspans of as much as two feet have left their imprints in the fossil record, ancestral arachnids (spiders, scorpions) as big as melons, cockroaches a foot long and other crawling insects were everywhere, all of which served as food for each other as well as for the amphibians and fishes that swarmed in the rivers, oceans, lakes and swamps. There were sharks in the oceans, bony fishes, clams, brachiopods, ammonites, and the swamps were loaded with lobe-finned fishes (Coelacanths and Rhipidistians amongst them). Invertebrate animals abounded in the shallow marine coastlines and in the rivers and swamps.

The first dinosaurs AND the first mammals both appeared in the Triassic period From the Mesozoic era.

Dinosaurs that eat plants and grasses are called herbivores. Those that do eat meat are carnivores. Ones that eat both meats and plants are called omnivores.

Until recently, the earliest known dinosaur was the Eorapter Lunensis "Dawn Raptor" which evolved in the late Triassic Period some227 million years ago. It was a small, carniverous primitive Therapod dinosaur and lived in what is modern day Argentina. It probably grew to about 1 metre in length. However a fossil found in Madagascar recently could date to 230 million years ago (dated using radio-isotope dating). Only 1 jaw bone has been found so far but it appears to be a herbivorous primitive sauropod.

It possibly can be zoology because its an animal.

First, you need to be in the part of the country where the rocks were laid down when the dinosaurs were alive. In the United States, this is mainly out West. Then you need to look at layers of these rocks that have been exposed by erosion. Look at the same rocks every few years, because more material will "weather out." Finally, if you see something than looks like a bone, don't be in a big hurry to dig it up, because you could damage it. Call a university and ask to speak to a geologist.

Herbivores ate grasses and tree leaves.

Carnivores ate meat from other animals.

They hunt because they need to eat something and can't go to a store to buy food.That is WHY they HUNT.

human?

Carnivorous dinosaurs such as Tyrannosaurus rex had no natural predators, but large herbivores such as Diplodocus would have been preyed upon by predators of the time. Some herbivores were naturally too large to have been eaten once they reached their full size.

Some dinosaurs will have been cannibals and will have therefore have eaten each other and perhaps even their young.

It is highly likely that some carnivores were opportunists, which meant that once another dinosaur was dead, they would prey on it.

I believe that some form of alligater/crocodile was alive during the dinosaur age. It may have been slightly different than the modern crocodile but it was relatively the same and it ended up being the crocodile of today.

There are several different reasons why species become extinct. Sometimes extinctions are related to catastrophic global events such as the impact of a large comet or meteor, causing firestorms, great clouds of debris blotting out the sun, and so forth. Sometimes it is just a matter of natural selection as described by Darwin; species compete with other species, and some species lose the competition.

oil, and natural gas

A doctor and coroner is usually called to the home to pronounce the person dead and if the person died suddenly then an autopsy would have to be performed. If it was a lengthly illness and the person left instructions to die in their home then it would only take a doctor to pronounce the demise of the person. The ambulance will take the person away (an autopsy may or may not be done) and then the remains will go to a funeral home. In Canada the remains are left for 3 days. There have been a very few instances where the person had stopped breathing (or extreme shallow breathing) and did not die, so to be on the safe side they leave the remains for the three days before burial or in some cases cremation.

Spinosaurus, although both the Allosaurus and commonly known Tyrannosaurus Rex are close behind.

Because they are closely related. Specifically, birds are dinosaurs belonging to the clade Maniraptora (alongside such dinosaurs as Velociraptor and Deinonychus), within the clade Coelurosauria. There are hundreds of skeletal similarities between birds and their maniraptoran relatives. One would expect closely related animals to show such similarities in their skeletons (and other features), just as our skeletons betray our kinship with the great apes, and primates in general.

Quadrupedal. And it means walking on four legs whether you're a dinosaur, a dog, or a gecko. Quadrupedal is the Latin... the Greek equivalent is Tetrapodal. Both mean four-footed, and both are used to describe animals that move on four limbs.

It lived in the early Cretaceous Period.

I think that the natural causes of the extinction of animals and plants is a natural disaster.For example: volcanoes, earthquakes, plate movement, magnetic reversal, mudslides, floods, drought, global warming, etc.

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I'm afraid you are not quite right there. Individual events such as single eruptions and mudslides have only local effects. Extinctions imply world-wide changes, usually of climate, but these can follow very large-scale, very long-term volcanic activity.

Earthquakes don't drive species into extinction - their only fatal effects on wildlife are local and generally from either resulting tsunamis or landslides.

They say there are different theories why the dinosaurs are not alive anymore. One of the theories is that a meteor crashed into the earth, its impact was so massive that it caused volcanoes to erupt which then went into the sky and ash and rock fell from the sky. Which would have suffocated the dinosaurs. They also may their might have been a disease which wiped them out because they didn't have good immune systems.

The Edmontosaurus was a herbivore; it consumed vegetable matter.

it means youre crazy or you are having a vision but that's happened to me when i was a kid and i was halusinating.

It does NOT mean you are crazy AT ALL. There is a possibility that you could have watched a scary film and IF not, like me also having dreams about T rex and things... it means you are insecure. The dinosaur can perhaps take the form of a person in your life that you fear and want to avoid or hide from. I was abused for two years and have recurring dreams about T rex, that dinosaur is him, a scary life form. This is the correct answer.

Not long enough to perpetuate a legend about it dwelling in a certain loch, in a certain northern European country.

No, there is no evidence of terrestrial dinosaurs which lacked a pronounced tail. But modern penguins would probably qualify for not having a tail.

The most likely answer is that, if a meteor really did hit the earth, burrowing mammals were hiding in the crust of the Earth, and were unaffected by most of the effects, like the clouds in the sky, and the momentous impact. As most of their food lay undeground,they had no need to leave. Eventually, they left the burrows to find a world mostly clear of dinosaurs, and were able to assert some control.

No. Nothing can ever "evolve again." One group of animals may evolve to resemble another, but they will never be the same thing. That said, many scientists consider modern birds to be dinosaurs and some birds have regained some of their more dinosaur-like traits (though most of those are extinct).