Bill Bryson wrote a book called "A Short History of Nearly Everything" last year. It's pretty good. If you want a survey of the physical sciences that's interesting and written for normal people (as opposed to academics or people who like to read textbooks for fun), check it out.
The descriptions of what has happened and would happen in the event of a comet striking the earth or an enormous volcano erupting are pretty vivid.
The descriptions of what has happened and would happen in the event of a comet striking the earth or an enormous volcano erupting are pretty vivid.