Prehistoric creatures
Prehistoric creatures refer to many living organisms that live on earth, and the age ranges from about 3.8 billion years ago to about 3500 BC, when humans began to retain the record. During this evolution, many new forms of life were born; many dinosaur creatures were extinct. The type of prehistoric creatures includes cell-like organisms in the ocean, algae and protozoa, and more complex eukaryotic multicellular organisms such as fungi, plants, mollusks, insects and vertebrates. At the time of the geological age, the time of human appearance is quite late, and early humans were formed about 4 million years ago. There are a few prehistoric creatures that still exist on the earth, such as celestial spirits, which are called living fossils. In addition, such as sharks, but also after hundreds of millions of years without much change in the creatures. But most of the creatures that once appeared were 99% extinct, leaving only remains, footprints or other fossils. ...