With amazing feats of speed, strength and agility, superheroes have captured our imaginations since the first comic strip. But if someone really were faster than a speeding bullet, more powerful than a locomotive or able to leap tall buildings in a single bound, what laws of physics would need to be overcome? And how would a superpower actually affect a hero and his or her surroundings? Michael Dennin, UC Irvine physics & astronomy professor, will discuss the science behind superheroes 8-9 a.m. Tuesday, May 19, at the University Club. A complimentary breakfast will begin at 7:30 a.m.