Historically, girls have not been encouraged to be scientists, to be explorers, and there's a social kind of constraint, of course. Having the responsibility, a disproportionate part of the responsibility, for caring for families, caring for children. I know this challenge from firsthand experience because I have three children and four grandsons. And some of the time I have spent as a scientist and as an explorer has meant choosing to not be with my children and grandchildren as much as I might otherwise have done had I not been a scientist, an explorer.
One of the challenges of the show has always been trying to be surprising, and that was easy to do when nobody was watching it. Now that people have started watching it, they get ahead of us. We've all started really guarding the material, just to make it fun for the audience.