I have to throw computer virus's out there... Wouldn't life be so much easier if we did not have to worry about backing everything up 24-7 or our computer randomly dying?
Also, I can't believe someone said antibiotics. Yes it is true they have crazy/long names, but those have actually helped mankind!!!
First off, have you ever been obliged to study antibiotics? D:<
On a more serious note (well, not serious at all really), let's consider that anti-microbial therapy is an evolving cat-and-mouse game that we cannot win, only prolong. In this light, antibiotics are a necessary evil. Speaking of which:
But I think the worst thing to happen to the Earth is mankind
In this light, since antibiotics are created by man and antibiotics are essential to mankind's survival, antibiotics are therefore the worst creation of mankind >
Disney....(yea, you heard right) I am sick of Disney grabbing teen age girls off the street, giving them a microphone, and then unleashing them upon the world to flood the radio, tv, and internet with computer generated filth which they try to call music...