Communicating science: where is the evidence?

I went to an interesting panel discussion about science communication the other day. The panelists were all accomplished scientists who did a lot of outreach and science communication and were talking about how important and rewarding it is, and how we should all do more of it.

To  which I agree, but more and more, I am also wondering: How do we know it’s working? And are there things that work better than others? And are we really spending our time and resources where they are most needed?

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