Dinosaurs

Dinosaurs went extinct around 66 million years ago during the Cretaceous-Paleogene (K-Pg) extinction event. This event marked the end of the Mesozoic Era and the beginning of the Cenozoic Era. It is believed that a combination of factors, such as a massive asteroid impact and volcanic activity, contributed to their extinction.

The major geologic event in the Jurassic Period was the continuing breakup of Pangaea.

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This is correct, but I found a more detailed answer on the second paragraph on

http://science.nationalgeographic.com/science/prehistoric-world/jurassic.html

The first birds appeared during the Jurassic period, around 150 million years ago. They are believed to have evolved from small theropod dinosaurs.

The whole world was a good home for dinosaurs. Dinosaur fossils are found where sedimentary rocks of the right age are exposed. The Western United States has Jurassic and Cretaceous beds, so we find Jurassic and Cretaceous dinosaurs there. There are few dinosaur finds in the Eastern states because the rocks there are too old, being laid down before the dinosaurs appeared.

South Dakota is known for its rich fossil deposits, including fossils of dinosaurs like Triceratops and Tyrannosaurus rex. Other fossils found in the state include marine reptiles, mammals, and plant remains dating back millions of years. The Badlands National Park and the Black Hills region are particularly well-known for their fossil discoveries.

The most common places to find them are at limestone quarrys. These contain smaller sea life but are more common. Larger ones show up all the time in different stages, from Montana to Mongolia.

Utah's Henry Mt. has fee digs. And most coast lines you can find Bi-valve fossils and Gastropods. ALL AROUND THE WORLD

No, water does not come from dinosaur pee. Water on Earth is part of a continuous cycle called the hydrological cycle, where it evaporates from oceans, lakes, and rivers, forms clouds, falls back to the earth as precipitation, and eventually returns to bodies of water. Dinosaurs did not create new water molecules through their urine.

The first air-breathing animal is believed to be the lungfish, dating back to around 400 million years ago. Lungfish have both gills and a primitive lung, allowing them to breathe air when necessary. This adaptation was crucial for early vertebrates transitioning from aquatic to terrestrial environments.

Before the dinosaurs there was a plethora of life including fish, trilobites, lungfish, amphibians, and plenty more.

In the Proterozoic era (2 billion to 650 million years ago) there was an assortment of single-celled and simple multi-celled creatures. The next 200 million years (early Paleozoic) showed a great expansion of life in the seas, including a diverse assortment of corals, mollusks, trilobites, sponges, shrimps, and other creatures. the next 150 million years (late Paleozoic) included the development of fish, land plants, insects, amphibians, and ultimately reptiles and flowering plants. The earliest dinosaurs began roughly 250 million years ago (the Mesozoic).

No, at the end of the Mesozoic era, about 66 million years ago, the continents were still in the process of drifting to their current positions. It was during the Cenozoic era that the continents took on their modern shapes due to the continued movement of tectonic plates.

It was the largest predator ever weighing over 160 tons and up to 82.5 feet long Throw in a ten foot mouth and add a jawful '18' inch teeth and you've got the perfect killing machine.It would make the shark from "jaws" look like a goldfish.

The first fossils were likely discovered by early humans thousands of years ago. However, formal recognition of fossils as remnants of ancient life and the development of the science of paleontology began in the 17th and 18th centuries. The first fossil recognized as such was a large tooth found in the 17th century.

Humans 2 million years ago, such as Homo habilis and Homo erectus, were smaller in stature with a brain size ranging from 500 to 1000 cc. They were primarily vegetarian foragers and used simple stone tools. They had adapted to bipedalism and began to exhibit more complex social behaviors.

How the mammals survived the extinction event 65 million years ago is still a hotly debated subject in science.

The most commonly held theory is that mammals were small and adaptable. Larger animals find it much harder to adapt when faced with a crisis such as the one that saw the end of the dinosaurs. They need to eat far more and are much more susceptible to changes in the environment.

A fossil can be as big as the organism creating it, so as large as a blue whale. A slightly more liberal definition would allow us to define a whole forest as a single fossil, therefore an entire limestone seam would be an ancient reef, or a coal seam would be a fossilized forest, or a geological layer would be a ancient coast line.

It is essential we try to understand how the dinosaurs died out. It is not just for scientific endeavour.

At the end of the cretaceous life on the planet was already in decline. Dinosaurs and other animals were already becoming extinct even before the K-T impact event. It is likely that the impact in the Yucatan was only the final nail in the coffin of an already dieing world.

Unfortunately the extinction rate now mostly because of human activity is far higher than at the end of the cretaceous (some estimates say that the extinction rate now is faster than at any other time in history). If an impact occurred now we need to know as much as we can so perhaps we can survive.

A paleontologist can determine whether a dinosaur was a plant eater or a carnivore by analyzing the shape and structure of its teeth. For example, flat teeth are characteristic of plant-eating dinosaurs, while sharp, pointed teeth are typical of carnivorous dinosaurs. Additionally, examination of the dinosaur's skull structure and jaw mechanics can also provide clues about its diet.

No, it wasn't lava that killed the dinosaurs. The most widely accepted theory is that they were killed by an asteroid impact that caused a chain reaction of events, including massive wildfires, climate change, and the destruction of food sources. This event led to the extinction of most species on Earth, including the dinosaurs.

== == They were called dragons or beasts. Actually the word dinosaur means terrible lizard. * dino-terrible * saur-lizard. So that leads to the conclusion that we stll have dinosaurs today. (for example: Komoto Dragon)

Gastroliths were the smooth, rounded rocks that dinosaurs ingested to help them digest and grind their food. These rocks were swallowed and moved around in the stomach to break down tough plant material.

The theropods were bipedal because they were carnivrous hunters. Running on two feet allowed them to be swift and agile so they could hunt prey better. This rendered their forelimbs unimportant so they grew small.

the first bird to come to earth was about 160 million years ago. this is by faith bradford

*by G1N4* to be more precise it was the Mezozoic era and the Jurassic period.

Through finding dinosaur fossils we can determine what they looked like and how they lived. It is important because we can they estimate how they lived and their features, it might also tell us what the world used to be like, by some of their characteristics.