It's a Miracle!

And Sharkbait was apparently holding out on me.

An autopsy of a Blacktip shark that died while at the Virginia Aquarium in Virginia Beach (where Sharkbait works) was found to be pregnant with a pup. Thing is, there were no male sharks around to impregnant said Blacktip. Cross species impregnation was also ruled out - I'm not even sure that even happens. At any rate, when DNA testing was done on the pup (Coming soon: CSI Aquarium!), it was found to have only the genetic material of the mother, and none of a father.

You can read more about the research here.