Do you ever wonder how we all got here? On Earth, I mean. Forget the song and dance about Adam and Eve, which I know is a load of crap. My father likes the myth of the Pawnee Indians, who say that the star deities populated the world: Evening Star and Morning Star hooked up and gave birth to the first female. The first boy came from the Sun and the Moon. Humans rode in on the back of a tornado.Mr. Hume, my science teacher, taught us about this primordial soup full of natural gases and muddy slop and carbon matter that somehow solidified into one-celled organisms called choanoflagellates... which sound a lot more like a sexually transmitted disease than the start of the evolutionary chain, in my opinion. But even once you get there, it's a huge leap from an amoeba to a monkey to a whole thinking person.The really amazing thing about all this is no matter what you believe, it took some doing to get from a point where there was nothing, to a point where all the right neurons fire and pop so that we can make decisions.More amazing is how even though that's become second nature, we all still manage to screw it up.