There is survival but there are no survivors. Gravity. What is it? It is something to grab on to. You can touch it. Gravity. Particle or wave? Who cares? What is it that can oppose gravity? Or, better, if gravity causes us all, always, to full down, what then can cause us to fall up? Answer: water. Why does water cause us to counter gravity? We being the counter? What is the counter? Stop.