we know that from both animal and human research over many decades. i'm not sure if it's technology per say, or the way we use technology and the way we get engaged in technology from a young age to an older age these days. >> did this trip change your mind in some way? you walked in a skeptic. how do you feel about things now? >> i've always been involved in hiking, rock climbing. i appreciate time away. in most of our daily lives, we don't get a lot time for reflection. we're focused on our blackberry, computer, and dealing with every day problems. and this kind of trip, getting immersed in nature, without a phone without a computer provides a necessary respite for reflection. >> david, you say somewhere in there that attention is the holy grail here. what is the message? what do you think our audience should take away from this experimental nature trip you guys took?