Dinosaurs are a special theme that appeals to most children across the planet. There is something about these extinct creatures that attracts and holds the attention of kids. You will surprise to see that they can recite all Dinosaur Names and facts about each one through Dinosaur Pictures. And they always learn and finding everything about These prehistoric creatures. So what are dinosaurs? "And why are they so much concerned? What are the precise definitions of dinosaurs that make dinosaur lovers always want to learn about them?
Dinosaurs are living creatures on our planet more than 150 million years ago. The name Dinosaurs means "terrible lizard" and has many meanings because they were big creature and scariest. They have a variety different of sizes from a chicken to others over weighing nearly 100 tons. Their diets are also very different, one of them being herbivores while others carnivorous and others an omnivore eats both plants and meat.
Scientists have not yet discovered how dinosaurs are extinct. Their fossils were first discovered in 1800. By studying these fossils, researchers know that dinosaurs are ancient cousins of some species like crocodiles, snakes, bird, and lizards today.
When and Where did dinosaurs live?
Scientists have studied that dinosaurs lived from about 245 to 65.5 million years ago during the Mesozoic Era. And they divide the Mesozoic into three periods: the Triassic, Jurassic, and Cretaceous.
The first Triassic period (252 to 201 million years ago)
This is a time when the climate is relatively dry and hot and especially without polar ice as it is today. This is also the environment where dinosaurs first evolved. With this dry climate, some reptiles have heat-resistant skin, such as the skin of some mammals "Therapsids", some flying lizards like Pterodactyl, Pteranodon...others Coelophysis that have "hollow form", Plateosaurus.
Jurassic Period (201 to 145 million years ago)
The Triassic period is a mass extinction of terrestrial animals. However, some dinosaurs still survive. The more they grow and increase in quantity. During this period, the temperature was cooler due to more rainfall. These changes lead to a number of large grow plant species such as ferns, and ponytail. This vegetation is the main food for some herbivorous dinosaurs such as Apatosaurus, Diplodocus, and Brachiosaurus.
Cretaceous Period (145 to 66 million years ago)
The dinosaurs at this stage grow very diverse and are present almost everywhere in the world. Besides, a number of other groups of organisms also develop diverse. However all dinosaurs do not have to live at the same time, they can live together and not extinct together. They live in all different environments, from tropical forests to arid deserts.
In this period dinosaur development was very diverse. For examples some dinosaurs that live during this period include
Velociraptor (aka Raptor): This dinosaur is about 3.3 meters tall, weighs 60kg and it has a smart brain to plan and attack prey. Its bite force reaches 8000 newtons equivalent to today's spotted hyenas. It is a formidable predator in the wild world.
Velociraptor is not only the obsession of small dinosaurs like Zephyrosaurus but also brings fear to even larger dinosaurs like Tenontosaurus. Therefore, the Raptor is also known by the scientific world as speed bird of prey, to describe their ability to destroy prey quickly. And it is considered one of the key factors contributing to the brand's success of Jurassic Dinosaur Games. Especially is the Jurassic Park Games game.
Triceratops is a herbivorous dinosaur. It is 3 meters tall, 9 meters long and weighs about 10 tons. Triceratops is one of the familiar dinosaurs in a series of Dinosaur Coloring Games. Despite its scary shape, it's a dinosaur gentle and herbivorous species. It only uses horns to fight predators like T-Rex. And it's also one of the most commonly found fossils.
Stegosaurus belongs to the family of dinosaurs eating benign plants. Like the bison, it prefers to be fed with ferns or sesame trees rather than fighting. Stegosaurus's name means a roof lizard. Stegosaurus children who love dinosaurs can easily recognize Stegosaurus thanks to the thorny horns growing on its back in Dinosaur Coloring Pages. Besides, It appeared in some famous games like Dino Run 2, Dino Run 3 ...
This herbivorous dinosaur possesses a height of up to 10.1m and weighs 3,500kg, equivalent to the size of a large bus. They appeared at the end of the Jurassic period, about 150 - 148 million years ago.
Despite its size, Stegosaurus is the lowest IQ dinosaur. According to scientists' research, the Stegosaurus dinosaur's brain is very small, just as big as a walnut, equivalent to a dog's brain. So Stegosaurus dinosaurs are classified as the species with the proportion of brain correlated with the lowest body rate.
Tyrannosaurus rex (T-rex)
Tyrannosaurus rex appeared from about 68 to 66 million years ago. It weighs 7 tons, has small characteristic hands and is a violent predator and predator with their powerful bite. T.Rex's biting force is equivalent to a pressure of 8,000 pounds, 10 times the bite of an adult crocodile.
Based on the bone structure, scientists estimate they can run at 25 miles per hour, but some other scientists think this number is up to 32 miles per hour. Fossil samples show that the average life expectancy of Rex is 30 years
Tyrannosaurus rex is probably the most popular dinosaur in all species. It appears in most dinosaur-related games, including "Jurassic Park Games", "Dinosaur Robots Games", iconic games that cause destruction and death like "Miami Rex", "NY Rex" ...
Physical Features, classification of Dinosaurs
Scientists have classified dinosaurs based on many different factors, but mostly their fossils. Everything involves dinosaurs like fossil dinosaur bones, dinosaur eggs, and other trace fossils like footprints and muzzle rocks.
Dinosaurs come in many different sizes and body shapes. Some are giant creatures, weighing more than 100 tons. Others are as small as the bird.
Most skin of dinosaurs has scales. We still don't know what color the skin of dinosaurs is. However, some scientists believe that dinosaurs are usually gray and green. Others think dinosaurs have vivid colors. With these colors, they can hide predators, and maybe males want to catch the attention of females.
Some large dinosaurs, they move slowly on four legs to support their huge weight. Others can move with their hind legs and stand upright. Because they have lightweight, hollow skeletons and allow them to move quickly.
Some types of carnivorous dinosaurs have sharp teeth. They use this set of teeth to tear flesh and prey. Others have long necks and eat vegetation and leaves.
You may know that dinosaurs are egg-laying creatures. Currently, scientists have not yet studied how long dinosaurs live, but based on their fossils, scientists show that some may have survived for a hundred years. And they can live in herds. They were able to protect themselves in many ways such as using their horns to protect them, others using their sharp teeth.
Classification of Dinosaurs
Scientists have classified dinosaurs into two groups. A group is based on the structure of the hip bones of the dinosaurs - Ornithischia dinosaurs. The other group is lizard - Saurischia dinosaur.
This is a dinosaur that looks like the birds today. Ornithischians are people who eat plants. They can move on their two or four feet. They have flat teeth to crush hard vegetation. Stegosaurus is an example. It's a plant-eating dinosaur with a small head's. It has large, triangular bones protruding from its back. Or another dinosaur is Triceratops, with horns like a modern rhino.
This species of dinosaur is very similar to that of reptiles today. They are one of the largest creatures that have existed on our earth. Some species have some common characteristics with today's birds. The first bird discovered by scientists is Archaeopteryx - a Saurischian species. And then they divided them into two species: the carnivorous theropod and the plant-eating sauropods.
These species of Theropods are comprised of all carnivorous dinosaurs. Theropods go on their hind legs and they use sharp claws and teeth to catch and tear prey flesh. They can hunt alone to catch and eat smaller plant-eating dinosaurs. Occasionally, they hunt in groups and attack larger dinosaurs. Theropods include some species such as Giganotosaurus, Spinosaurus, and especially Tyrannosaurus Rex dinosaur.
Sauropods are the largest terrestrial herbivores ever living. They move on their four legs and are considered the largest of all species. An interesting thing about this dinosaur is that they have very small heads and brains compared to their giant bodies. Sauropods all have long necks, which allows them to take food on the tallest plants. Some species can also stand up with their hind legs to rise higher into the tree. In addition, they use long and muscular tails to hold equal when standing. Examples for some Sauropods are Brachiosaurus, Wikimedia Focus, and Apatosaurus.
Why dinosaurs extinction?
There are many reasons to think that dinosaurs are extinct. Extinction dinosaur is still a mystery and controversial for many scientists. They came up with different theories.
Some scientists believe that dinosaurs died because temperatures on Earth were too hot or too cold for them.
Others believe that an asteroid has fallen to earth. The falling meteorites can create dust and block sunlight. Plants will stop growing and lead to food-eating dinosaurs that will die from lack of food. And they become prey to other dinosaur meat eaters.
Other scientists maintain that dinosaurs can turn into modern birds like ostriches today.
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