You can check out the first few pages of the book here in a preview through Random House.
Greg made the observation that this is the first non-fiction book that I've read so diligently, this might be true. I certainly haven't flown through any text books in the past.
Bryson has a number of other books that explore many day-to-day things that I have never paused to think about. We own A Short History of Nearly Everything (which is a great source of science breakthroughs and theories) that I started reading but got swept up with teaching and never finished. I'll get back to it soon!