LINDA WERTHEIMER, HOST:
Good morning. I'm Linda Wertheimer. Batman may be able to save Gotham from super villains, but he's no match for physics. Four British graduate students produced a paper called "Trajectory of a Falling Batman." It says Batman could glide over a 500-foot building, as he does in the 2005 movie, "Batman Begins." But he'd hit the ground at a life-threatening 50 miles per hour - Dark Knight not rising. It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.