describes how public opinion changed over the course of the 20th century, often paralleling societial anxio societial anxieties. this is about an hour and 15 minutes. >> let's start with with a question nobody will have any problem having their answer recorded for television for. show of hand. how many people believe alien life exists pretty decent number of people. i'm going to throw in there as well. i think so. steven hawking thinks so in a giant yun verse, there is a probabit

describes how public opinion changed over the course of the 20th century, often paralleling societial anxio societial anxieties. this is about an hour and 15 minutes. >> let's start with with a question nobody will have any problem having their answer recorded for television for. show of hand. how many people believe alien life exists pretty decent number of people. i'm going to throw in there as well. i think so. steven hawking thinks so in a giant yun verse, there is a probability that somewhere, alien life has evolved and probably looks pretty different from us, but it might be out there. slightly different question. how many of us believe that aliens have visited earth? the only man with the strength of his convictions. appreciate that. so here's a question. is the idea that aliens visited earth in and of itself a conspiracy theory? no? >> if you take into consideration the fact we're trying to go to mar, we would be alien life there, so the fact that another life form say that has become sbel jeintelligent eo do space travel, visit another planet isn't really a conspiracy theory. >> yeah, seems