Doorways to a Parallel Universe?

Big Bangs may be happening all the time, creating an ever-expanding number of parallel universes.

Physicist Michio Kaku, who visits 2/21, thinks he knows a way to create a portal to get into one.

Kaku formerly hosted the show "Physics of the Impossible," based on his 2008 bestseller, on Discovery's Science Channel. See a clip from the episode here (and pardon the commercials).