Is There a Single Theory of Physics?

Katie Robertson: It seems convenient that there are sometimes simple stories that you can tell. But the thing I can't get over is the fact that sometimes it's not, she says. Sometimes we look at systems and they are complex and our approximations fail to find a simple story of what happens in them,. She asks if aliens do science on some other planet? Do they have like a different ladder of science because of their own history?Robertson: To my mind, I think there's going to be lots of different answers to that rather than one answer that fits the relations between all different scales.