Did Animals Live a Billion Years Ago?

The animals that developed and evolved on the earth in the early stage, such as Jurassic dinosaurs and trilobites, were mostly extinct due to evolution or changes in the earth's climate. Today, evidence of these animals can only be seen through fossils. However, some animals such as platypus and crocodiles have continued to adapt to changes in the natural environment during a long evolution.

Prehistoric animal

The evolution of living things is a very complicated process. But the evolution of living things is all about

The history of the earth is at least 4.6 billion years, and the history of human beings is only a small part of it. Then what kind of animals were on the earth before the time when humans appeared? Why once dominated the ocean

1. Archaic:

(1) Formation period of more than 5 billion solar system planetary systems

(2) Approximately 4.60 billion earth formation and chemical evolution

2. Proterozoic:

(1) About 3.50 billion bacteria & algae era

Sinian Period: (1) About 1.90 billion & 1.30 billion [same as below]

3. Paleozoic:

Cambrian & Ordovician: 544 million & 505 million eukaryotic algae and invertebrates

Silurian and Devonian: 438 million and 408 million naked fern plants and fish age

Carboniferous & Permian: 360 million & 286 million ferns and amphibians

4. Mesozoic:

Triassic & Jurassic & Cretaceous: 245 million & 208 million & 144 million gymnosperms and reptiles

5. Cenozoic: Tertiary: Paleozoic & Eocene & Oligocene & Miocene & Pliocene:

66.4 million 55 million 38 million 244.6 million 5 million angiosperms and mammals

Quaternary: Pleistocene & Holocene: 2 million & 10,000 human age modern animals modern plants