Antimatter
Antimatter is quite possibly one of the most paradoxical concepts ever to grace our glorious ball of dirt. While everything that takes up space is made of matter (your mom is made of a lot of matter... oh well, that really doesn't matter does it?), A few things have been found to be made of a theoretical substance called "antimatter". Thus, antimatter must give off space instead of taking it up, else antimatter would be made of matter. Some physicists say nothing is made of antimatter, but let's remember, nothing is something, too.
Antimatter is highly evil.
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