precambrian era
Precambrian Period – The beginning of life
Our planet formed from a cloud of dust and gas some 4.56 billion years ago. The Earth’s vast history is divided in four major eras: the Precambrian, the Paleozoic, the Mesozoic and the Cenozoic. The Precambrian era covers most of our planet’s history and lasted from Earth’s inception until 542 million years ago. It was during this era that the Earth became solid, the atmosphere became breathable and life emerged.
There is little evidence about the events that led to the creation of our planet billions of years ago. Most of the knowledge we have about Earth’s beginnings comes indirectly from meteorites that smashed into our planet or from rocks gathered from the Moon. The Earth is just a miniscule part of the immense Universe surrounding us but for us it constitutes the center of it and the only planet known to us that bears any form of life. Our planet is part of the Milky Way Galaxy and it constantly revolves around the Sun and around itself which causes the night and day alternation and the season changes.
The Precambrian period covers about 90% of Earth’s history and is divided into three periods: the Hadean, the Archean and the Proterozoic. The Earth formed some 4.56 billion years ago during the Hadean period which lasted from Earth’s inception to about 4 billion years ago. Initially, there was nothing but an enormous cloud of gas and dust. Progressively, the cloud began to rotate and contract and about 10 million years later the major planets that make up our Solar System - including the Earth - formed. During the Haden period our planet had an atmosphere deficient in oxygen, there was no life on it, its surface was mainly molted lava and the planet was constantly bombarded by meteorites. The Earth’s atmosphere was mainly water vapor, nitrogen, carbon dioxide and a combination of other gases in small percentages. There is no evidence of rocks or any form of life from the Hadean
Our planet formed from a cloud of dust and gas some 4.56 billion years ago. The Earth’s vast history is divided in four major eras: the Precambrian, the Paleozoic, the Mesozoic and the Cenozoic. The Precambrian era covers most of our planet’s history and lasted from Earth’s inception until 542 million years ago. It was during this era that the Earth became solid, the atmosphere became breathable and life emerged.
There is little evidence about the events that led to the creation of our planet billions of years ago. Most of the knowledge we have about Earth’s beginnings comes indirectly from meteorites that smashed into our planet or from rocks gathered from the Moon. The Earth is just a miniscule part of the immense Universe surrounding us but for us it constitutes the center of it and the only planet known to us that bears any form of life. Our planet is part of the Milky Way Galaxy and it constantly revolves around the Sun and around itself which causes the night and day alternation and the season changes.
The Precambrian period covers about 90% of Earth’s history and is divided into three periods: the Hadean, the Archean and the Proterozoic. The Earth formed some 4.56 billion years ago during the Hadean period which lasted from Earth’s inception to about 4 billion years ago. Initially, there was nothing but an enormous cloud of gas and dust. Progressively, the cloud began to rotate and contract and about 10 million years later the major planets that make up our Solar System - including the Earth - formed. During the Haden period our planet had an atmosphere deficient in oxygen, there was no life on it, its surface was mainly molted lava and the planet was constantly bombarded by meteorites. The Earth’s atmosphere was mainly water vapor, nitrogen, carbon dioxide and a combination of other gases in small percentages. There is no evidence of rocks or any form of life from the Hadean