Annihilus? They hardly know us! See? I told you I was going to throw in some jokes here (I never said they were going to be good). I do know this thing's origin though, so don't worry. You're about to get learnt up. Annihilus started as one type of life spore that an alien species was meant to spread around the world. The ship carrying Annihilus (this was before he was the artist known as Annihilus) crash landed on a planet, and as the crew died they released his spore. He became a bug, but ended up learning the alien's technology to become strong and intelligent. I make it sound easy, but it really wasn't.
That's right. The 50th strongest person in the Marvel universe started out as a bug. Talk about not letting your upbringing affect your future. What's your excuse?