221 Facts About Earth

The Precambrian time was followed by the Palaeozoic era. The first major period of this era was Cambrian Period (600 million to 500 million years). Major fossils show their earliest occurrence from this period. Time Period: It extends from around 600 million to 225 million years ago. Features:♦ The Palaeozoic is best known for explosion […]

Proterozoic eon is the third and last eon of the Precambrian time. Time Period: This eon extends from 2.5 billion to 600 million years ago. Features:♦ During this eon, the Earth started getting its present day shape and landforms arose. The Earth experienced global glaciation for the first time.♦ Life began to appear from simple

Archean eon or Archaeozoic is the second division of the Precambrian time. Time Period: It began around 4 billion years ago and extended till the beginning of Proterozoic eon 2.5 billion years ago. Features:♦ There were many volcanic gases in the atmosphere, but the dominating gas was carbon dioxide and the level of oxygen was

Hadean Eon is the first division of the Precambrian time. Time Period: The duration of this eon is between 4.5 billion (beginning of the Earth) to 4.0 billion years ago. Features:♦ This is the time when the solar system, including the Earth had just formed from the cloud of dust and gases. Those clouds and

Evolution of the Earth: Evolution of the Earth: Evolution is a process of gradual growth and development of life on the Earth from simple to complex form. Evolution of the Earth started around 4.5 billion years ago, when our solar system took shape due to the massive explosion of a small molecular ball called the