Martha Jones. She's working at Genessia Hospital now. We're both from Earth, just from different Earths--so there are some things that are common, and then things that are different. The same as with your Earth probably. Some differences, some similarities or even out right things that are the same.

If you want later, I'll make you a flow-chart. How familiar are you with Quantum Physics and Dimensional theory? Or...is that something Wizards don't really deal with.

[That latter trailed off slightly sheepishly, as Trunks really isn't sure. He's not sure--from what little he knows, if the world Dumbledore is from has normal physics.]