Problems that baffle science

All of nature is full of question marks that we find everywhere... among the grass and flower leaves, in the hair covering mammals, in the mountains and rocks, in the sky and the sea. It is one of the joys of life for a person to discover these question marks, and those problems that have yet to be solved only partially, or that have not been solved at all, and to try to answer these questions. The answers to many of these very important questions have reached such accuracy that justifies our saying that there is "reasonability" in nature, but solving one puzzle opens the door - in many cases - to other puzzles, and so the search continues.