That's still a vague question, but how humans as we know them today came into existence is through evolution.
edit: If you're talking about how life originated, that's abiogenesis, but there's no definite answer to that yet. Again though, be more specific in what you're asking.
Here's a vid on one of abiogenesis's models that helped me understand it better:
Are you referring to darwins theory? curious, because i know nothing about evolution, or other forms of it. I'm just a bit curious as to what improvements have been made since his supposed, "flawed theory".
__________________
Quote:
Originally Posted by Callipygian
There's always some issue you can find with the exact terminology of a game. In fact, let me here make a case that the current system has racist undertones:
Blackflags are worse than whiteflags and AAA's are indicated as yellow in R^3, suggesting that a perfect score is Asian.