Detailed text transcripts for TV channel - CNN - 20100501:01:11:00
Say -- you can't say one way or the other. you can think maybe caution would be a good idea. >> larry: stephen theorizes the negative aspect, does he not, john? >> he rightly thinks we should be cautious, and i'm not going to second guess professor hawking. but that is what is so intriguing, isn't it, about this whole subject? could there be life out there? if so is that just some sort of green gloop or is it something that is a real menacing threat. that's what we don't know. many better scientific minds than mine are obsessed with looking. i think you've got guests later who will tell us a l...