Here is a beautiful example of stalactites, the bigger formations, and soda straws, the thin tubes. One of the mysteries of the world is why both formations exist side by side. What makes one formation grow into a giant carrot shape and the other into a slender straw-like tube? One thing I have found over the years is that the unknown and mysteries are right in front of us everyday. You are deluded if you think you understand how the world works. I know there are theories as to how both stalactites and soda straws are formed, and I understand the mechanism very well. But why one and not the other?