When did the first human exist? And when did they start populating the earth?
There is no answer to this, as "humans" are evolved, and are still evolving. When did the first catfish appear? There is no answer.
Thanks and What did humans evolve from?
http://humanorigins.si.edu/education/introduction-human-evolution
So six million years ago?
I just want to know when did humans start populating?
six million years ago is a good estimate. No one wrote it down.
So nothing is accurate? But estimated
Let say the humans started populating six million years ago, how come there is only over 7 billion people? I mean if you calculate the population today should be in 100 trillions
You're not accounting for
~ poor hygiene and understanding of germs
~ diseases and illnesses
~ pandemics
~ infant mortality rates
~ wars
~ accidents
... and all sorts of other reasons for humans' deaths.