Author
A PhD in theoretical particle physics from Harvard, now a professor there.
Benefit
Another book on cosmology -- think Hawking but a bit easier to read. I didn't suspect that the title would be a gimmick (theoretical physicists are not widely known for such things) -- the book doesn't really focus on the relationship between dark matter and dinosaurs. The two are only related because they were once part of the same universe. Great book, though.