The Collapsing Universe: the Story of Black Holes

The universe is a very strange place and to me, the most bizarre objects are black holes. They are things where the gravitational attraction is so strong that not even light can move fast enough to get away. While the complete definition of black holes requires a great deal of sophisticated mathematics, the fundamental principles are easy to understand. No one is better at explaining science and in this thorough, non-mathematical explanation of how black holes can exist, Asimov is at his best.