Sunday is my day for spiritualism and philosophy.  So today I inquire into why we are here.  There is, of course, the biblical version, where God created everything.  But you can refer to the   Bible   or   Quran   or other historical source to find this answer. This not a particularly religious blog site, so I will instead today look into how  Homo sapiens  came to be and maybe not quite answer the question of  why  we are here. The Big Bang, followed by the subsequent formation of stars and galaxies, is the leading theory of our beginning, from which came our solar system with Planet Earth, then evolution to us.  You've seen these forms of graphic before: Clearly, there are galaxies, and our Milky Way is but one. When you look up into the night sky, almost all what you see are stars from our own galaxy.  If you searched and searched with your naked eye, you would be able to see only three galaxies.  The others are t...