I checked the link, and I found it SO disturbing! Anyway, I do believe they were giants as I believe the Bible. Kent Hovind has a good theory as to why people grew up so much in times past. You guys should out his seminars :
http://video.google.com/videoplay?do...63631666&hl=en
As for the horned people (mentioned in the first link) and UFO's, I don't have a clue. I used to believe in UFO when I was lost, but now that I'm saved, I don't. The whole UFO deal could just be a distraction or the strong delusion that God sends on the last days.