Asked by Isaiah
                When did the first human exist? And when did they start populating the earth?
            
            
        Answers
                    Answered by
            bobpursley
            
    There is no answer to this, as "humans" are evolved, and are still evolving.  When did the first catfish appear? There is no answer.
 
    
                    Answered by
            Isaiah
            
    Thanks and What did humans evolve from? 
    
                    Answered by
            bobpursley
            
    http://humanorigins.si.edu/education/introduction-human-evolution
    
                    Answered by
            Isaiah
            
    So six million years ago?
    
                    Answered by
            Isaiah
            
    I just want to know when did humans start populating?
    
                    Answered by
            bobpursley
            
    six million years ago is a good estimate.  No one wrote it down.
    
                    Answered by
            Isaiah
            
    So nothing is accurate? But estimated
    
                    Answered by
            Isaiah
            
    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
    
                    Answered by
            Writeacher
            
    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.
    
~ poor hygiene and understanding of germs
~ diseases and illnesses
~ pandemics
~ infant mortality rates
~ wars
~ accidents
... and all sorts of other reasons for humans' deaths.
                    Answered by
            isaiah
            
    I am accounting those too and it still doesn't add up to it.
    
                    Answered by
            isaiah
            
    it's still no where near
    
                    Answered by
            Scott
            
    "modern" humans (us) arrived on the scene about 30 - 50 thousand years ago
around the end of the last ice age
there was limited interbreeding with the Neanderthals -- who were on the way out
there have NOT been people like us around for 6 million years
plug a different time into your calculation
    
around the end of the last ice age
there was limited interbreeding with the Neanderthals -- who were on the way out
there have NOT been people like us around for 6 million years
plug a different time into your calculation
                    Answered by
            Ms. Sue
            
    Apparently you didn't read the site that bobpursley posted.  Our human ancestors appeared about 6 million years ago.
    
                    Answered by
            Scott
            
    the key here is "modern" humans (like us)
Isaiah is using 6 million in some population growth scenario and getting weird results
he's not interested in the start of the genus homo, he want to count people
    
Isaiah is using 6 million in some population growth scenario and getting weird results
he's not interested in the start of the genus homo, he want to count people
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