Art conservation science, marine science, and nuclear science can be combined with science with another interest. Anyone can have this combination with a little knowledge from each of them but later, of course, they will study and will have a strong grip over the concepts of this combined study program.
You may learn biodiversity in conservation sciences while having a background knowledge you have learned in biology previously. Whereas marine science, which is also known as oceanography can also be a great choice. You study the physical and biological aspects of the oceans. Nuclear science is the most interesting one as you enter into the world of atomic particles.