I learned something very interesting and happy to share with you: Sometimes a theoretical concept is very fundamental and well known by everyone in a specific field of science while the same theory, in another field of science or department , needs deep research and only the intelligent can understand.
Good question. I have learnt the act of research, putting quality papers together, plagiarism consciousness, making good presentations and above all perseverance
I agree with all replies above. But to me, it was interesting to see how research and science is done. What learnt may change, but it will be through research again....