Dating lava online

The first fossils were a type of blue-green algae that could photosynthesize.

Earth's atmosphere was first supplied by the gasses expelled from the massive volcanic eruptions of the Hadean Era.

The solar system was created from gas clouds and dust that remained from the Sun's formation some 6-7 billion years ago. Cabrol) Earth began to form over 4.6 billion years ago from the same cloud of gas (mostly hydrogen and helium) and interstellar dust that formed our sun, the rest of the solar system and even our galaxy.

This material contained only about .2% of the solar system's mass with the Sun holding the rest. In fact, Earth is still forming and cooling from the galactic implosion that created the other stars and planetary systems in our galaxy.

However, Earth is a planet teeming with vitality and is home to billions of plants and animals that share a common evolutionary track. What processes had to take place for this to happen? The fact is, no one has been able to come close to knowing exactly what led to the origins of life, and we may never know.

This period of Earth’s formation is referred to as the pre-Cambrian Period.

The pre-Cambrian is divided into three parts: the Hadean, Archean and Proterozoic Periods.

Earth’s initial life forms were bacteria, which could survive in the highly toxic atmosphere that existed during this time.

Toward the end of the Archean Period and at the beginning of the Proterozoic Period, about 2.5 billion years ago, oxygen-forming photosynthesis began to occur.

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Earth is the only planet we know of that can support life.

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