It’s nothing new to say this, but advances in technology change our lives. If you think more deeply, though, it seems that even before changing how we live, technology may actually be changing our very organs themselves. For example, the camera on a smartphone seems to be replacing our eyes. Rather than simply taking in a memorable scene with our own eyes, it’s now just second nature to pull out the camera and snap a photo. The smartphone camera even offers better resolution than our own sight, lets us replay moments, and makes sharing those moments with others easy—so in many ways, it's already substituting for our eyes.