What’s the deal with antimatter?

Antimatter can be found in science fiction and in fact. It both powers fictional starships and is associated with one of the most perplexing mysteries in modern physics. Since our theories suggest that matter and antimatter should have been made in equal quantities, yet we observe only matter, this mystery is really quite fundamental: Why are we here at all?

http://news.fnal.gov/2012/09/what-s-the-deal-with-antimatter/, by Don Lincoln