Dinosaurs originated in the late Triassic period about 230 million years ago, probably evolving from some lizard-like reptiles. The earliest dinosaurs were very primitive, with small bodies and simple muscle structures, ranging from only tens of centimeters to several meters.
As time went on, dinosaurs began to undergo large-scale evolutionary differentiation. Among them, theropod dinosaurs and ornithischian dinosaurs became the two main evolutionary branches.
Among theropod dinosaurs, some species with large bodies, strong attack power and fast speed appeared, such as Tyrannosaurus and Velociraptor. These species have well-developed muscles and strong limbs, and can run at amazing speeds to chase prey.
Ornithischian dinosaurs evolved long necks, long tails and limbs facing down, making them the largest herbivorous animals on earth, such as Brontosaurus and Diplodocus. In addition, there are some smaller species among the ornithischian dinosaurs, such as Archaeopteryx, which are among the earliest known birds.
The evolution of dinosaurs is very complicated, and there are still many unknown mysteries. However, from the perspective of fossil records and modern biology, the evolution of dinosaurs has brought us many surprises and inspirations, and also provided important references for our study of the origin and evolution of life.
animal tags：
you may also like
Dogs chewing things at home may be due to boredom, anxiety, lack of stimulation, or teething. Here are some tips for dealing with dog chewing: 1. Provide appropriate chew toys: Provide your dog with a variety of chew-friendly toys, such as rubber chew toys or sturdy bones...
The pufferfish (also known as the pufferfish) and the pufferfish both belong to the family Pufferidae, and they are usually freshwater or marine creatures, but they differ in many ways. living environment: Agouti (Acanthus): Generally lives in marine environments, but some...
The space race of the mid-20th century was not only a competition between nations but also a series of experiments that tested the boundaries of human knowledge and the endurance of living organisms. Before humans could safely travel beyond Earth, scientists sent animals into space to study the effe...
The Rottweiler is a large, strong, courageous working dog commonly used for guard, police and military duties. Its advantages and disadvantages are as follows:advantage:1. Loyalty: Rottweilers are usually loyal and close to their owners, showing extremely high loyalty.2. Confidence: Rottweilers are...
White discharge from a turtle's head may be normal, but it may also be a sign of a health problem. If the discharge is minimal and not accompanied by other symptoms, such as loss of appetite, decreased activity, difficulty breathing, etc., then there is usually no need to worry too much.However,...
There are many types of pet snakes, and here are some of the common ones: 1. Ball Python: Ball pythons are small, docile pythons that make great pets. 2. Prince Snake: Prince snake is popular for its beautiful appearance and docile personality, but it...
If you want to keep cats away from your outdoor area, here are some long-term, friendly methods: 1. Use a cat repellent: There are some commercial cat repellents on the market, and they usually use natural ingredients such as lemongrass or orange peel extract. These agent...
Lycodon rufozonatum is a common Asian snake, mainly distributed in China, Japan, North Korea, Vietnam and other regions. This snake is commonly known as the banded colubrid, so named because of its distinctive silvery-white rings on its body.The bungara snake is a non-venomous snake and does not pos...
Email: jsset#163.com (change # to @) Please indicate your purpose of visit! Guangdong ICP No. 2022053326 XML| map| Chinese
