The origins of life are incredibly mysterious. The life that we normally interact with is made up of chiral molecules, and no one actually knows why only certain chiral molecules are involved in our biology. No one knows how life began, or where it began, or when. Lots of basic questions about life have no solid answers. Attempts to duplicate the creation of life have generally only produced inanimate molecules (except for synthetic life
based on existing lifeforms). Here are just a few fascinating links on the topic of life.
If you'd like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post