What we know is that we exist. What is the scientific answer as to how and why?
Taken as an ultimate question of origins, There is none worth examining. Science concerns itself about things for which some analytical evidence of sufficient particularity to allow analytical analysis exists.
Your statement is absolutely incorrect. Science is always concerned about how. The evolutionists here certainly seem to think they have the ultimate answer to the why and consider evolution to be it. It is interesting that when you are put on the spot, you pull back your claims. Evolution cannot even give a consistent explanation of the how because it is not science.