Lets see...
Spiders- No need in explaining
Zombies- I'm fine with video games or movies about them, but them in real life makes me freak
The Universe- It's so big, something has to be out there, and watching Discovery Channel 24/7 (which I do) dosen't help with this
Heights- I'm not exactly afraid of heights, but if it's open (not behind a window or anything), then I think I could possibly fall out and die
Rollercoasters- I don't get this, I love them, but I get so scared when I go on them
That's pretty much it.