Science Buddies: "Ask an Expert"

Is there an opposite to everything? If so, what would be the opposite of a person( i.e. Like me) or who? This question was brought about after reading abou black holes and the possibilities of time travel.

Hi Mika2005,

Is this question related to a science fair project? If so, what is the hypothesis you are trying to test. If this is not related to a science fair project but is instead a general question you are curious about, then a different set of online forums would be better suited for your question.