How did we get to exist

[Python4tee6]

I mean sure thru endless years of evolution but when did it start how did it start (how did the first being in this universe got to exist)

[Nazheek]

The earliest known life forms are microorganisms found in hydrothermal vent precipitates. The oceans formed some 4.4BYA, so we know the must have formed some time earlier than 4.4BYA.

In a short, layman's sentence, life came from carbon enriched sources such. All known life comes from carbon, so the study of this atom is key to understanding ourselves.

A common theory is that monocellular life reached Earth much like how water did: via a comet, asteroid, or other object.