text:  If you close your eyes and you think about a red apple, what do you see? On the next Radio Lab. I cannot hear music without having a complete music video. It's like I have a TV on in the background. What does it mean to see in your mind? I can also walk through my entire childhood house. I can go into the backyard. I can walk to my friend's house. Or not. Like if I close my eyes and think about it, like it's really just black. That's on the next Radio Lab. Beginning Saturday morning at 10.