From the beginning of the age of dinosaurs to the end of the age of dinosaurs, how many species of d

In terms of time, dinosaurs lived for hundreds of millions of years; In terms of distribution, it covers all seven continents of the earth. However, most dinosaurs were found in the United States, Mongolia, China, Canada, England, and Argentina. In the United States, 64 genera of dinosaurs have been discovered, ranking first in the world.

40 genera were found in Mongolia, 36 in China, 31 in Canada, 26 in the United Kingdom, and 23 in Argentina. (Animals that are similar to each other are taxonomically classified into the same "genus", such as cats, tigers, lions, leopards, etc., all belong to the genus Cats, but they belong to different species.) Most dinosaur genera have only 1 species, and a few dinosaur genera have 2 or 3 species.

According to statistics, there are 285 dinosaur genera found so far, with 336 of each. We believe this is not the actual number of genera and species of dinosaurs that ever lived on Earth. There are also a large number of dinosaur bones buried deep in the ground, which have not yet been discovered.

There are also many dinosaurs who may have traveled in the world in vain, leaving no relics behind after death. Professor Dodson of the University of Pennsylvania in the United States has been studying for many years how to estimate the number of genera of dinosaurs that have survived on Earth. He estimates that 900-1,200 genera of dinosaurs once lived on Earth.

But only some of them have been discovered. And very few have been seriously excavated and studied after discovery.

I don't know.

No.

Dinosaurs first appeared in the Triassic period 100 million years ago and died out in the late Cretaceous period about 65 million years ago, and the earliest ape-man fossils found so far are only a few hundred thousand to several million years old.

The earliest fossil of an ape-man was found in 1891 on the Indonesian island of Java, dating from 60 to 800,000 years ago. The Javanese ape-man, together with the Peking man discovered in Zhoukoudian, China, in 1927, was once recognized as the "earliest" human in the world. However, this theory of the earliest origin of mankind was overturned by two later archaeological discoveries in China.

Archaeologists discovered fossils of ape-man in Lantian in Shaanxi Province in 1963 and Yuanmou in Yunnan Province in 1965, with Lantian ape-man dating back 1 million years and Yuanmou ape-man dating back 1.7 million years. In 1959, an almost complete fossilized ape-man skull and labor tools were found in Tanzania, dated to 1.75 million years ago. In 1972, fossilized ape-man skulls, leg bones and stone tools were discovered in Kenya and dated to 2.6 million years ago.

In 1973, it was reported that ape-man fossils were found in Ethiopia about 3 million years ago or 3 million years ago. In any case, the earliest history of mankind was only more than 3 million years, and it is impossible to live in the same era as the dinosaurs.

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