Dawkins manages to get a lot of science across in a very readable and understandable way. His writing is full of little nuggets of memorable prose:
Richard Dawkins wrote:It is therefore no accident that we see stars in our sky, for stars are a necessary part of any universe capable of generating us. 'This does not imply that stars exist in order to make us. It is just that without stars there would be no atoms heavier than lithium in the periodic table, and a chemistry of only three elements is too impoverished to support life. Seeing is the kind of activity that can go on only in the kind of universe where what you see are stars.'
or
e.g. blood groups: you and a chimp might be group O, while your partner might be group A.For particular genes, you are more closely related to some chimpanzees than to some humans.
Great stuff