Nothing (pardon the pun) earth shattering here. Nuclear war, a comet, earthquake volcano, all described in hard to read, detailed, pretty dull context. A lot of the information is old, 15 years or more, and irrelevant to modern scientific discoveries. The book had a few interesting parts in relation to comets and asteroids, but otherwise it was a difficult read that 3/4 of the way I gave up on.