Always Room for Improvement

At the closing of the section "one clew remains, Einstein and Infeld make an interesting observation. They state, "In our great mystery story there are no problems wholly solved and settled for all time" (35). As we near the end of the course, I feel that we can pretty much agree with Einstein/Infeld's comment. After all, Aristotle thought he had a grasp on an understanding of Nature only to be proven wrong by future generations of scientists; the same goes for Ptolemy. Men like Copernicus and Kepler figured out parts of a problem while the gaps in their theories were filled in by later generations. Even Newton's work was not 100% right/complete. 

Thinking to the future, I wonder what gaps in our current understanding of Nature will be filled, because as history has shown us and as Einstein/Infeld agree, it is bound to happen again.