Ask Dr B: Is the multiverse science? Is the multiverse real?

Kay zum Felde asked:

�Is the multiverse science? How can we test it?�
I added �Is the multiverse real� after Google offered it as autocomplete:




Dear Kay,

This is a timely question, one that has been much on my mind in the last years. Some influential theoretical physicists � like Brian Greene, Lenny Susskind, Sean Carroll, and Max Tegmark � argue that the appearance of multiverses in