The 'Friday sessions' refer to something that you're not paid for and not supposed to do during your professional life. Curiosity-driven research. Something random, simple, maybe a bit weird - even ridiculous. Without it, there are no discoveries.

The biggest adventure is to move into an area in which you are not an expert. Sometimes I joke that I am not interested in doing re-search, only search.

Graphene is a single plane of graphite that has to be pulled out of bulk graphite to show its amazing properties.

In my experience, if people don't have a sense of humor, they are usually not very good scientists, either.