The two habits stealing your sleep that you never suspected.

What's the finding from your research that you think most people would be genuinely shocked by?

I'm going to take the prerogative of answering with two things. I think the importance of the lighting we expose ourselves to, as well as the timing of when we eat — both of these are really important and robust ways to regulate our own sleep-wake cycle.

And I think we underappreciate the importance of these in our real life.