We got pretty good at out-competing homo erectus and homo ergaster for resources. Although erectus lasted far longer than any other homo genus (1.5 million years to our approximate 150,000 or so years), we were better evolved physiologically. More compact, therefore requiring less calories. Much larger brains growing faster from milennia to milennia. Our braincase also developed differently. It's actually less complex than the erectus braincase, which suggests the sapien brain retained the psychological flexibility associated with adolescence. This flexibility correlates to adaptibility.
So, to answer your question, we're different because evolution granted us certain biomechanical advantages. Or God did, if you like.
But the difference isn't as drastic as you appear to have been led to believe, respectfully. We were, at one time, surrounded by people who weren't that much different from us. Just different enough to prevent impregnation, which is what primarily differentiates one species from another. And "at one time," about 50,000 years ago, was a blink of an eye ago, as the age of the Earth is counted. In billions of years.
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"The idea that money doesn't buy you happiness is a lie put about by the rich, to stop the poor from killing them." -- Michael Caine
Last edited by Johnny Rotten; 07-06-2005 at 07:24 PM..
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