This makes me want to crawl in a hole and cry. xDDD I've used Illustrator in my Graphics class last year, and maaan I don't even know how you did any of this stuff. Really, really good job. They all look great. >w< Ha ha ha ha, graphics and art, definitely noooot my field to go in as a career, ah ha ha.
I keep thinking the atom one is a nuclear disaster or radiation or something, but those aren't usual occurrences in nature, are they? >__<; That or disease, which doesn't even make sense because what do sicknesses have to do with atoms. xDDDD