When you think of solving mazes, you think of mice. Mice have been use to do science for ages. In turns out that mice are not the only beings that can solve a maze. In fact you don't have to be intelligent at all. Even these polymers can do it. By reacting on the difference in pH levels in the fluid the polymers are able to find their way out of the maze (video).
The project was conducted by the Self assembly and addaptive systems group at Nothwestern University.