That really depends on when you believe the first human being was born. many people believe this was about 10,000 BC, the number you are looking for is around 20 Billion
7 Billion are currently alive now.
Many scientists believe that the first life forms on Earth lived in ancient warm water oceans or hydrothermal vents. These environments provided the necessary conditions for simple organisms to develop and evolve over time.
In ancient civilizations, many cultures believed in gods that lived on Earth among humans. These gods were often seen as powerful beings who influenced human affairs and were worshipped through rituals and offerings.
There are almost 4 thousand different species of mammals including human beings.
Maximum a human being has lived up to 126 years. UNBELIEVABLE!! but factual.
The concept of human beings as a species has existed for a long time, but no single person can be credited with "discovering" them. The scientific study of human origins and evolution involves contributions from many researchers in various fields such as anthropology, paleontology, and genetics.
Human Beings
two
360 joints
30,000
Impossible to tell.
As we were not there to count it would be impossible to answer this question.
Earth and Neptune formed together so it has lived the same number of Earth Years as Earth has.