ice core, and several geological things that just cannot exist, but one thing we heard from bill, ken hanson, he mentioned several things, including the idea that this can't exist. there are two types of science. take a listen. >> you don't see the idea. i emphasise there's a difference between historical science, and talking about the presence, observational science >> if we estew science and the process, and divide signs into an observational science and historical science, we will not move forward. >> a lot of us know that evolution is accepted in scientific, there's not much certainty. 60% of americans, according to a poll, 60% of americans believe in evolution. 30% still support creationism. and that group, according to the poll is white evangelical conservatives. neither man thought they'd change the others mind on stage. the purpose was to get the information out there, they feel it is important and allow people watching to think critically and make decisions on their own. >> was this a polite debate? >> it was very polite. it was set up basically, you know, where each man had their o