The edge of science is where we place God. The edge of human understanding is the unknown. What humans do understand has been constantly expanding. We know that atoms come from stars. In the nuclear holocaust of massive novas, we find evidence of new atoms being forced together from immense pressures and temperatures. After some passive reactions, these elements remain until comparable forces change them once again. So many are left unchanged for billions of years… many on the Earth right now. Every bit of matter is an element or combination of elements. What we call life is the height of what we know of complexity in arrangement of these atoms. So complex, in fact, that we are now able to question and test what it is that we really are. We know that the atoms that make up human life come from stars, but many molecules come from space as well. Simple molecules like water or amino acids (the basis of life) travel countless light-years in the form of comets or other heavenly bodies and land on protoplanets… like they did on to Earth billions of years ago. So what are we? What am I? I have considered myself to be this body… a brain, organs, muscles, and tissues. But none of these things really belong to me. Sure I have possession of them for scores of years, but not even a blink in the lifespan of the atoms and molecules that make up my body. So I am borrowing these atoms from the Universe, using them for now and then when I am gone, they still exist. What does that leave me with? A boundary condition… a set of relationships. No real substance belongs to me but I can imagine that I exist. Am I even real? These questions push us to the very edge of science. What is matter besides a particular state of energy? Is there a soul? There is a conceptĀ  of dark energy. No one knows what it is but there is evidence that it exists. There is still much to be learned, much room to grow. I imagine, I believe, I strive for an open mind. I may not be able to see the wind, however, I see the leaves blowing on the trees.