football field. >> listen, that's enough space for me. i don't need a lot of space for a vacation home. >> nasa's probe sent spectacular pictures home. and there is the best picture in the sky, tabby star, getting inexplicably brighter and dimmer. sign of intelligent life sthp. >> i'm sure there are. there are probably, you know, other lives out there in outer space, but i won't know parts of it. >> closer to ground, the solar impulse 2 powered entirely by the sun touching down ironically in the dark. and on earth, self-driving cars are now logging millions of miles and production cars could be widely available in a few years. >> i am against it. i like to have control of the will for myself. >> we have cell phones that explode and now they want to go to self-driving cars? i think that's a leap future. take your time. >> fair point.